Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef6af5e6b3924686…

MALICIOUS

PDF

90.9 KB Created: 2021-03-14 11:59:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8655f138befe7007dab28158c0839234 SHA-1: 6cee125df1f9de1f23623b8e911f3af80b394c4c SHA-256: ef6af5e6b392468660701776f06c23f35125ca45ad77adac0f0d1c6c9d6aec08
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, indicating a link farm likely used for SEO manipulation or to distribute further malicious content. The document body itself is largely unreadable, but the presence of 'El infierno de gabriel pdf 2' suggests a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=el+infierno+de+gabriel+pdf+2 PDF link annotation
    • http://istlan.space/joruxalelijuvipa2z35u.pdfIn PDF document text
    • https://jowozulabu.weebly.com/uploads/1/3/4/0/134013075/43474bfc7e5d.pdfIn PDF document text
    • https://rasozonikazip.weebly.com/uploads/1/3/4/9/134904665/pizufi-pabedenux-fobevifuw-mumusikatiruvim.pdfIn PDF document text
    • https://labekefetimobu.weebly.com/uploads/1/3/0/7/130739294/bivakegavuwon.pdfIn PDF document text
    • http://probmake12.xyz/19693229142rxw77.pdfIn PDF document text
    • https://xifexovajebim.weebly.com/uploads/1/3/0/7/130740184/7027701.pdfIn PDF document text
    • http://madewithsunshine.com/8410866047595ls1.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/how_to_program_sears_craftsman_garage_door_opener0otfk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457320/normal_5fe1b824c6546.pdfIn PDF document text
    • https://xuvetopugoseja.weebly.com/uploads/1/3/4/4/134484667/4311985.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/Ljbqih0/symbols_and_cool_letters_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454550/normal_604b54056d649.pdfIn PDF document text
    • https://tovejuzu.weebly.com/uploads/1/3/5/3/135398771/c4a097497013.pdfIn PDF document text
    • https://jinoranimewaxop.weebly.com/uploads/1/3/4/5/134528513/ligoxovomarorusereb.pdfIn PDF document text
    • https://kezagoguz.weebly.com/uploads/1/3/4/1/134131769/javomelefesil_bixofiwipo.pdfIn PDF document text
    • https://kupalupatumer.weebly.com/uploads/1/3/1/8/131857031/wiper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_602317545ac6a.pdfIn PDF document text
    • https://cdn.sqhk.co/xufaribo/hjiesgg/bullet_league_battle_royale_mod_apk.pdfIn PDF document text
    • http://blacktea.space/13492254462pz0mw.pdfIn PDF document text
    • https://sowovejapa.weebly.com/uploads/1/3/4/7/134709895/3770989.pdfIn PDF document text
    • https://luvabuzizav.weebly.com/uploads/1/3/5/2/135294148/legipafaroxo.pdfIn PDF document text
    • https://xatuguje.weebly.com/uploads/1/3/1/8/131856293/jiradujim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f52a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52A 4968 bytes
SHA-256: 7e52d41f4746f13fa271f3245166e31bfe03c920dea3f1d34c2b797f8786ff12
font_01_sfnt_off00010607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10607 1896 bytes
SHA-256: 2b760e4d9c379db4d46ddb6987aece3fd67233d25a0333d28c7f0438d5e1202a
font_02_sfnt_off00010f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1E 12480 bytes
SHA-256: 4660be69871682d0c13800b04059dfd4c5308614705ca1bc46cf9b0b94e56a03
font_03_sfnt_off0001381c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1381C 16120 bytes
SHA-256: 467334b253c03183b8f59c8c7859f446a4d85e3bd71546e4bc7697603d08a064
font_04_sfnt_off00014cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CF5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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