Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c459e4f293e790…

MALICIOUS

PDF

69.6 KB Created: 2021-03-16 11:03:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 21719caf7a518e38f977c8b24d4fdeda SHA-1: 842ca33c08c32cccceaf5295a4b7703425ccccc1 SHA-256: b5c459e4f293e79082c8413f24054826fb3400e321a2e987b198e6e0ae49c78e
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/wix?keyword=craftsman+18+volt+battery+adapter PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4390643/normal_5fff6cfa94331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_6011134b4d9bc.pdfIn PDF document text
    • http://fb-ig-copyright.com/86286489839hcwl9.pdfIn PDF document text
    • http://lerob.info/wuseninomibexmol3g.pdfIn PDF document text
    • http://yourcy.com/what_happens_in_the_12_days_of_mourninge54ai.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389603/normal_5ff2bcf580ad1.pdfIn PDF document text
    • http://grigolia-studio.ru/laboratory_manual_for_anatomy_and_physiology_6th_edition_answersqlz0t.pdfIn PDF document text
    • http://simcars.ru/tp-link_tl-sg1005d_instructionspn6xm.pdfIn PDF document text
    • http://otomail.business/reruliwebajugufidjedh.pdfIn PDF document text
    • http://opros.xyz/dudurolofibekufatawekujsqguh.pdfIn PDF document text
    • http://heleogose.online/61854531323kvqgr.pdfIn PDF document text
    • http://merishwheelrecords.com/30888391588lvyjc.pdfIn PDF document text
    • http://creamwalls.online/gedutepokesexippytap.pdfIn PDF document text
    • http://vedice.ru/a_lesson_before_dying_movie_123movieszmohj.pdfIn PDF document text
    • http://latuha.com/good_morning_my_love_photobkj6l.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/tibunanogowulefijimupabaxzmaao.pdfIn PDF document text
    • http://soldonlakewood.com/2689929531084mtw.pdfIn PDF document text
    • http://cpatrump.com/214452897376is2h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424010/normal_60077c5d471c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bf8cf7f-138e-4a10-9acd-dfc6d1a3b189/vexamalinodogom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0713130c-b303-4d52-b4d0-6595a56be6e6/fitbit_versa_lite_notification_service_not_running.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9c817e2-3d5e-41e9-910d-350bbe3e78b5/mumomalujaw.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_off0000d1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CC 5640 bytes
SHA-256: a2951bf8ca8773062b3d4db9976e1883545ea806f03e6fa868efccde6b7d9305
font_01_sfnt_off0000e4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F4 10544 bytes
SHA-256: 0a4dfbd373bc5cf5a8f1a797a17c39159422207d2e00c42aca97680d9eb4dba2

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