Malicious PDF — malware analysis report

Static analysis result for SHA-256 01faf989a518d79f…

MALICIOUS

PDF

83.8 KB Created: 2021-09-15 13:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9fc2ee3de49565643de1025fa7d183f0 SHA-1: 5402b747c92f7c9f22cb4fd047ee84f46b0710ce SHA-256: 01faf989a518d79f7e340908187d508dc9bfb9ea6e4d01d3086a057d8e612fbc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be part of a link farm designed to improve search engine rankings. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade gateway security scanning. The presence of ML_NYX_PDF_MALICIOUS and ClamAV detection further supports its malicious nature, suggesting it's a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://inwebjor.ru/uplcv?utm_term=watch+race+for+the+white+house+online+free PDF link annotation
    • http://autoscuolapezzano.it/userfiles/files/94088405518.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/tetililaruxivepa.pdfIn PDF document text
    • http://sjanzee.nl/file/63703555124.pdfIn PDF document text
    • http://baltyk.recykling-rejs.pl/imgturysta/files/niduburaf.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/ziretebokovadagoba.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/jonaribexozud.pdfIn PDF document text
    • https://taperagi.com/contents/files/lezuf.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/gapuzaximixeg.pdfIn PDF document text
    • http://expnavi.com/sites/all/sites/default/files/file/71788218676.pdfIn PDF document text
    • https://simpangkanan.com/contents/files/xibegenixolomitufejotobur.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/37908337476.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/jfqk5lv9bt73k01gkq9mskd2ng/girimaguvexufiwozekeferin.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/cvjukmgsg0es3003d10d19c1b3/rolid.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138b2af69a81---jebosofij.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/5a0f37f0f87088aaa7c73a6ce243f270/xuridekawam.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/62769981253.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/tevixakitiniweraxitemu.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/bububuka.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376b0667adf---mivexedopalijex.pdfIn PDF document text
    • https://aneri12.eu/res/file/86469512771.pdfIn PDF document text
    • https://kochitaxirental.com/ckfinder/userfiles/files/49576361135.pdfIn PDF document text
    • http://smirna.pl/files/file/balanu.pdfIn PDF document text
    • http://klusjesindex.nl/images/uploads/kufegewidenujarowitetoz.pdfIn PDF document text
    • 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_off0000e2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B9 17552 bytes
SHA-256: 7199c5272d3089a221b5ad815051732e8a26352b5c384d9ea4e1be2ea0ab567d
font_01_sfnt_off000110d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D9 10612 bytes
SHA-256: 1f9c0db0c83879e0aea183f565fd63c75dbe2b80b2a80046f66b60ee8854318b
font_02_sfnt_off00012926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12926 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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