Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e7025f20327853…

MALICIOUS

PDF

105.6 KB Created: 2021-06-20 21:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9f599e41b64ededeaa1ddb89fee87252 SHA-1: 3fa16ff65fb125feb8a96dbdb9193c46b3dd59d2 SHA-256: 97e7025f2032785323af6d55f3035b68aabb23a3afff9e2fe51ce149c496c752
156 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 0.9996

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://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6382e568c---22915400636.pdf In PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/ed8q36nupqbqlh1kca1cvit4r1/ligipobuzig.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/v3cb6vt13spu6bmd1lj67tgu42/newuzedigusexebotif.pdfIn PDF document text
    • https://kopari.hu/files/file/50697878723.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/0573ee4ebe11603d2bbc26feeece8c98/wurefazowirefokin.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb3569c2c0---37375309045.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8a9382eec---ruzijani.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/galitasawuvor.pdfIn PDF document text
    • http://kleiberit.ru/files/file/refojimoxabedaw.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/v225dds0cc85fmdtv8d7h43vv9/15448837765.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/eeff647144275ab07314fb5c36f36f47/54711982351.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/90524444669.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a285333d087---59981918335.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/gavoratavu.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/85892673491.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/wojilovevatuzov.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/~3/3vuEKuznOb8/uplcv?utm_term=awm+with+suppressor+soundPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CDF 5036 bytes
SHA-256: eddc6f96344ad3c29dbb9860bb2e4f9230c6c23b1ac2937c3d8f78d6e5a09c86
font_01_sfnt_off00014de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DE0 2116 bytes
SHA-256: 8db65adc699bed2ed4e99b174e414cace916d9ae25f4e5597e3d94de4d1667c8
font_02_sfnt_off00015788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15788 12576 bytes
SHA-256: 559f80db8a34fb8eabd498ece3d5b72c0583f0e9645b500d0def79602ddcb120
font_03_sfnt_off0001804b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1804B 17112 bytes
SHA-256: 8d931078a8bda077e62b6226989e9ca7a204b5b2ded984cec863dfc844f848f3