Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e976d2cd64b8305…

MALICIOUS

PDF

91.3 KB Created: 2021-07-06 22:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 69cbc7e58d4890c03f4fcda71e1eb8c8 SHA-1: 759d14b024b9dc1bfce199976e4a8cb4811cff0b SHA-256: 8e976d2cd64b8305c7f6202e563ce5c2587c184aa0092b8988d1c548d0129d7e
204 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, indicating a phishing or malware distribution attempt. The presence of a 'download button' lure further supports this, suggesting the user is tricked into downloading a payload. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/f89lv0sccbfnm2t9h62675if02/lapamuterolenupotefuk.pdf In PDF document text
    • http://marinapogon.pl/upload/file/46593323489.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/52751421683.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/jedijagokaligo.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e22c39d1553---bebalorozejezevamuw.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/j3mvqd0d04mkcr6co6qoeum7c2/zimupowenitabusowij.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a8e77434b---12735690456.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/83690518390.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/zedamoxol.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/37712840186.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/34030767b4b9af6c756b31fb71f690b7/supaj.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160946b227b397---mafekinizoz.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/7c7feab2b5bb827e2895221681c7055f/regevobisok.pdfIn PDF document text
    • http://fairytaleweddingsandeventsbymary.com/clients/f/f2/f272f95a0afb65faa7304057ec0e56f6/File/29115733678.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/drlus3altg9slp1l89e5gd0hd0/pufuwed.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/susibekozerisibole.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/9lr970gp3hlefft2khbd20jd98/78890884364.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/11673089322.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/i79ra7teg3mdpp0b4lip9a2dvc/zisudijifokivitu.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/nazozepisororomimeje.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609736346498c---64861869248.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/kubegotuxup.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d66dbdb857---56995175647.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/0354e7c47ef799ba837cd1557a3f631e/42592394807.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/xamifubudabawurozi.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c15cb415b---rilamajelagizefudavavu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=difference+between+lawyer+and+advocate+and+barristerPDF 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_off0000fda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA1 17708 bytes
SHA-256: ba2c6578c545688184539d3729b60911b5d190c28406409e79f042c43b4c1f31
font_01_sfnt_off00012c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001444c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1444C 10876 bytes
SHA-256: 6bd01aa94834acaf5e3b2645144d8fca130a03d28975dcefb9ff60b48cbac8f0