Malicious PDF — malware analysis report

Static analysis result for SHA-256 60335148a8aa4525…

MALICIOUS

PDF

84.8 KB Created: 2021-09-02 02:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cd6626e91f089234a2075075b93d9089 SHA-1: f4aa71d89c67269dde918e730db4fcca9adfc209 SHA-256: 60335148a8aa4525a465d2b4904f70186b8646efd15b60f47ff627ab6ca80b59
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites hosted on potentially compromised or disposable domains. The presence of numerous links to PDF files hosted on various domains suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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 http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffce39f9b4---bonegapedebowej.pdf In PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/ruzotipajokug.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/8b042744f2670dd38daed1cb39b2a372/68668012140.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/rizokiwawutoroxorolefapa.pdfIn PDF document text
    • http://hoggard1975.com/clients/a/a4/a43fc1111b7ad4318f8b553feb79a890/File/gopamoxa.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/gojegupedugozelaxi.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cec06dccd6---vetimosemepisevukes.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/95137108884.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/vagebutufisuzewegi.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fc5df91c00e---84557053415.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/41676705612.pdfIn PDF document text
    • http://feuerwehrobrigheim.de/upload/files/23479083787.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/katidopiwadedopow.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/3069c599206932690d8398412c4fc82d/8313826401.pdfIn PDF document text
    • http://medica-brno.com/files/nezege.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9af235de4c---mewawevek.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/1ln7vss42g71iqg0h7lu96j615/9253780271.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/88368625350.pdfIn PDF document text
    • https://nuttydog.hu/ckfinder/userfiles/files/jobopenes.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/15005224950.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/62211061361.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/14b6e760477d293c13b2bdbb0b2e07ff/41822530317.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/50265070184.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/wugavutabufudenomumom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=one+mole+of+an+ideal+gas+at+an+initial+temperaturePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE844 10968 bytes
SHA-256: d81f89a3b7564860aedb069b5a0425c73a0be852766b7483d622bead996d806d
font_01_sfnt_off00010179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10179 16900 bytes
SHA-256: ae01a4159065e560969a4714109c6fe7b8ec402244299e36eda9413efa8a4f92
font_02_sfnt_off00012d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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