Malicious PDF — malware analysis report

Static analysis result for SHA-256 60dcdacaf6a8d2ff…

MALICIOUS

PDF

85.7 KB Created: 2021-10-06 02:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 1b4212698c42a2acc20f77a9c5090635 SHA-1: f3a705fa0aea5502d949c18a7fc459bb3c186037 SHA-256: 60dcdacaf6a8d2ffe70d2a6d0c97d39dec8daa8fc160cab2cccb204e3c5e1689
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, with numerous URLs pointing to potentially compromised or disposable hosting. The embedded URLs are likely intended to redirect users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://maryalo.com/userData/board/file/91699296580.pdf In PDF document text
    • http://mextro.de/upload/files/14356533016.pdfIn PDF document text
    • https://5ky13lu3-1251.com/contents/files/xowevet.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/a9cd333279693bdaeaa8bfc49906c9f0/25352947364.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/zonaviwe.pdfIn PDF document text
    • https://livres-arts.com/ckfinder/userfiles/files/zidovutanikob.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8fe051751---lokoporusu.pdfIn PDF document text
    • http://health-bridge.in/upload/file/pekokipivowunuz.pdfIn PDF document text
    • http://somkuthyoptika.hu/editor_up/36317248413.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/a1a40ae161b2f7f3d6ff8deffe6e00fd/78505663704.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d4fddac5b1---favuzavolemajekita.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/divebiv.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/pugofisunitexigefubafeg.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/87148261819.pdfIn PDF document text
    • http://monikaknoblochova.com/userfiles/file/vedolon.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615a6e7d22c70---44603902237.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/tidepivomejalibapokitifi.pdfIn PDF document text
    • http://lrm.mcdonalds.ua/ckfinder/userfiles/files/vikafazamuloga.pdfIn PDF document text
    • http://webcertain.ca/contentupload/fckeditorUploads/organization_/file/wazoxavukunajukegafovuzid.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/pabonofobukusuxi.pdfIn PDF document text
    • http://jin-hung.com/userfiles/file/nivonukisegi.pdfIn PDF document text
    • http://synphabase.ch/upload/file/julakitowel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=simile+for+stupidPDF 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_off0000e995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE995 18964 bytes
SHA-256: ba7ebf97def2ad1033fe4875149957fedad930846d98d86fc8cb5b5519ac1b4f
font_01_sfnt_off000119f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F8 10568 bytes
SHA-256: cc543bd1ba239e4fda240849f575c45a1c1b1125f4f8f84f52161d7b0209280b
font_02_sfnt_off0001320a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1