Malicious PDF — malware analysis report

Static analysis result for SHA-256 912af645bcf7e483…

MALICIOUS

PDF

89.1 KB Created: 2021-07-31 04:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f74475f9ca99fcb7de797279a1599dd7 SHA-1: c0ba5546511c9ec31fd0e94dfd007501ee5bf641 SHA-256: 912af645bcf7e4833733e106bfb36aea1fd8266f0be03c98c7dadee38a0a5ac9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be redirecting users to potentially harmful content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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 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://jullien38.com/ressource/site-image/files/gedurexanize.pdf In PDF document text
    • https://vresponse.net/userfiles/file/87237332038.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/bbfaf7040daedcfa4661bbc457f398be/lenogunem.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/40352110855.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090be53f3422---ponarimati.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/0h9k3qmuc2bjtrsjsv6tj4i8ro/dadorozasosire.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/6146f7c713b5ef7562e579904c31022c/jujikadopimuv.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/dca94bc4fec66ccec33bbf5737ab2998/bikuluselogelatit.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609879eae8dcf---5774595027.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/58032055198.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/19408505814.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/es9truq3662b4jut54uvme27k6/xopunon.pdfIn PDF document text
    • http://nissanotogovap.vn/uploads/images/files/44013145895.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/45042610182.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/17399201593.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/iasi8lkhu5v1dmro2gafk57ht7/54757217866.pdfIn PDF document text
    • https://efnnma.org/files/file/78744420223.pdfIn PDF document text
    • http://zussobrance.sk/grafika/dokumenty/patadupovofobuwu.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/27406826033.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/zitelazefevo.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/2982932544.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8207d7d35---53522307375.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=fabjob+guide+to+become+a+death+doulaPDF 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_off0000f727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF727 10792 bytes
SHA-256: 274cbd21114782768cbe01f9e71f39522a9ad025b98c49c1202b9b3197df500a
font_01_sfnt_off00010fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBD 17868 bytes
SHA-256: 562e091d5816731d4a2e3d99c51d29a6a65714d0d1a21fcdf28a0d922e6fa7f2
font_02_sfnt_off00013eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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