Malicious PDF — malware analysis report

Static analysis result for SHA-256 6078f079eb868808…

MALICIOUS

PDF

84.1 KB Created: 2021-03-29 03:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a0d9c2321eee869ac52b63aa4babf984 SHA-1: 95e1b95d7316672d080c80ce2d7249c8fe4406ae SHA-256: 6078f079eb86880895ff3a992691b7d9dbe2b0a50a87bd8a05ceeefe231c4413
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://kuzutuzo.ru/strik?utm_term=characters+of+six+of+crows PDF link annotation
    • http://itdiscount.pro/12_steps_of_na_explained6gg9w.pdfIn PDF document text
    • http://fly-drive.online/43890332953d0dz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417325/normal_5fdd933789e8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476432/normal_60057b5966987.pdfIn PDF document text
    • http://terakusinuw.mypressonline.com/what_happens_in_the_sea_of_monsters_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383446/normal_5fd68abb897a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391907/normal_6037ea46edfe9.pdfIn PDF document text
    • http://mugurapit.sportsontheweb.net/automatismos_industriales_libro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366655/normal_5fdfccff270b4.pdfIn PDF document text
    • http://vumogegotawugub.mypressonline.com/resulojekefadidiwiviwi.pdfIn PDF document text
    • http://vezuvujuwe.iblogger.org/nixon_corporal_gold_black.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuzolegogi.atwebpages.com/43849070750.pdfIn PDF document text
    • http://gizixaxeviduf.myartsonline.com/jeteduton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a08abae5-b12c-4461-86f8-f72785bec589/sonud.pdfIn PDF document text
    • http://judiserod.onlinewebshop.net/how_much_does_it_cost_to_fix_a_samsung_chromebook_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51dd76cb-b48b-48b4-9817-8d062d41d4ab/lenormand_card_meanings_download.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/senujaredokuwinijimisoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ed15e24-6e52-4806-9f29-c10965065ce8/rutatumu.pdfIn PDF document text
    • http://lapapagidufabo.rf.gd/online_compliance_reporting_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/977c7ecb-5c92-4cd5-8008-0fc45596601a/mogepoweg.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8B 5000 bytes
SHA-256: 39d7fdad10af625366ee6fe459cff58107639a55c03cefe825d1b8c83c351a97
font_01_sfnt_off00011e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E98 10704 bytes
SHA-256: 5e39fdffa7504392f80184ab5e11244348b7f1f4abbf25039ba2fbd10cc6db08

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