Malicious PDF — malware analysis report

Static analysis result for SHA-256 e129e3c017d62874…

MALICIOUS

PDF

73.5 KB Created: 2021-04-01 14:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 28fd6010c6b77482ac867b7849b3c027 SHA-1: cc1664add3c0cdaaaa4578d76da8e346db31f33c SHA-256: e129e3c017d6287495fffcef696dc852c981272b10c586cbc5bba0d511a30836
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 0.9998

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://xajibur.ru/aws?utm_term=what+does+sick+of+the+palsy+mean PDF link annotation
    • http://jepewadagamer.scienceontheweb.net/golf_buddy_watch_wtx_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_6058be08d5079.pdfIn PDF document text
    • http://supariwepexafat.mywebcommunity.org/suzimefasoberobojexufurej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468531/normal_60210ae8ca127.pdfIn PDF document text
    • https://vojojetisas.weebly.com/uploads/1/3/4/5/134589564/5990931.pdfIn PDF document text
    • https://zonotilikoper.weebly.com/uploads/1/3/1/0/131071062/9535814.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/bildungsroman_novel.pdfIn PDF document text
    • http://diruben.rf.gd/kijuvugikovasuxunajusaj.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/46466720390.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/working_capital_balance_sheet_format.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/electron_configuration_practice_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/dell_inspiron_3646_solid_amber_light.pdfIn PDF document text
    • http://joriwijosas.epizy.com/lapawuwupesupuki.pdfIn PDF document text
    • https://2ed9768e-82a7-41f7-bc91-4b86d8d7aa0f.filesusr.com/ugd/bdbd91_a88271d634064853abc5556508ecb291.pdf?index=trueIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_2f2aec981a9945a4bab5df9d8c6cf9bf.pdf?index=trueIn PDF document text
    • http://dajejat.rf.gd/hamilton_anxiety_rating_scale_scoring.pdfIn PDF document text
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_e3030e05b9704141acf234c9b595d038.pdf?index=trueIn PDF document text
    • https://04a80c79-134c-446e-801b-0c1635678e59.filesusr.com/ugd/5cebf8_deeca87ae5cc4e3aae588ee0f773a109.pdf?index=trueIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_a8864966e2fd4d319e5e61218f42b36d.pdf?index=trueIn 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_off0000e36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36B 5476 bytes
SHA-256: fcdfae80319092c35285a93a41f0ae6aa198b19fcc11e1d20803eb1183d8889a
font_01_sfnt_off0000f607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF607 10264 bytes
SHA-256: a4172003533c1cd52e0c24e22cbc5e579e2ba0d6fcc3007d6f1f0a908a160774

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