Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ab0d84034197bb…

MALICIOUS

PDF

104.2 KB Created: 2021-07-17 00:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0cb6cf6590e701a9d40385d328c4df1c SHA-1: fab24acb701db39a2d00d17dee544a1faabc9b99 SHA-256: 79ab0d84034197bb8a55bde4611be09dda7ce367802ee3e6dca8dc6d901548b1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites and other disposable hosting. These links host further PDF files, suggesting a multi-stage attack. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9682

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dodatnagarancija.com/userfiles/file/zufapaga.pdf In PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160895b5db8dad---46675507222.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d07efc8215---mosafebuxelem.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/gjqirnakm5lbjrqjnc9b7afmq7/kufiwixovuzoru.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076e3cd29881---kemofofudu.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a443feebd6b---70040039426.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210630165310.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/6a993787c8a128ec8c1de0506b853799/44063011932.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/2b70ea01c0225f5be5390359d177e1bc/raxitotoxexatipisoxifudo.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a46098bee---vibusugub.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/42652229520.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9d12370f8---59509496649.pdfIn PDF document text
    • http://motoren-adachi.com/js/upload/files/28775948583.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2d0fde3f22---vusivodupibefojemojurived.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/e8d435d59ad2f3e4304b2f5e97871863/litivoruruniton.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c882f89b0c8.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d932e14d7---95217550719.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/d0b9f08b0be5134c4318938a6f0195c8/68763915589.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2534664b5d---2338283303.pdfIn PDF document text
    • http://nomaquito-travel.com/editor-images/tupilofo.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a668adafcd---9391182095.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608556f49e53e---72522102641.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c56ee37fc9e---semuruku.pdfIn PDF document text
    • http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/99490934868.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/8709624343.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/lokaniwabifuduxuzewi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=dave+chappelle+deep+in+the+heart+of+texas+watch+onlinePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12301 19740 bytes
SHA-256: df460b474b470630b38ba8fcb5181d5fcdf55853fda6cb290f6d53f5480ae709
font_01_sfnt_off00015661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15661 2620 bytes
SHA-256: 19e94e03c6fbdd339916a2bdd5ac8ff12c64f8c268075eebda6480d9e5b56d21
font_02_sfnt_off000161bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161BD 10972 bytes
SHA-256: 2cfe46c6092d8e083e0031f8e858a733ef4dbee9834809098de5e010e2e083b3
font_03_sfnt_off00017b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.