Malicious PDF — malware analysis report

Static analysis result for SHA-256 69dfc058036c6024…

MALICIOUS

PDF

152.8 KB Created: 2021-06-21 16:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 36f56356642be3970d655cbbf9245c7b SHA-1: 074510554e4af2e68b3cd59734896e20cdf12bdc SHA-256: 69dfc058036c60249a957d050b660c37ae97b99fb6637ad83c427ce723b20d9d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9533

Heuristics 5

  • 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
  • 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.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b38fb549034---vikeloboxawez.pdf In PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160753b3b97747---20773688226.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2efb71bea9---pegagezegupomox.pdfIn PDF document text
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/cbb6926471e2a96f7ce0eb4aeeb5ffff/9501540937.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/57qk9tirseh5ni8ehi79gdikc7/3355335747.pdfIn PDF document text
    • http://www.siposferenc.hu/html/446802237.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/d38dac2eba66ded2e760534e4727b165/66063628712.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c53ff8efeb---21373043133.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d35c51a9a---1717122400.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608079a1a1477---81734653725.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/zuludiwuluf.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/5fcd30c74f1a2f14090f3c56ff51bb5e/7671071469.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d51e8ec93e---15332110177.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb7625fd90---povitijavuza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=what+is+cuneiform+writingPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ff21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF21 5716 bytes
SHA-256: afb6b5d27fe8a059ec45c2f70e1511ca95daf56a763b6c4b3a5c9528a8940e63
font_01_sfnt_off000212ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x212CE 5252 bytes
SHA-256: 5c318718b09902189266b37a3156a7f2dda284b18f2f53532ee45d5568b213b5
font_02_sfnt_off0002248a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2248A 18004 bytes
SHA-256: 936aaae64e2539cd95775c8059f77480dcb659c93161d44da762723ed797c64f

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