Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2cff06c915681b…

MALICIOUS

PDF

75.8 KB Created: 2021-03-30 22:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 684360540562d03d43afa524aa1ee61e SHA-1: 5439fb20117fdeb5e969ea328c9ddf45c6a794f5 SHA-256: eb2cff06c915681b863decb621e780543b892c63405400cacde6d13f122c6eb1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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
  • 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://zajinet.ru/wix?keyword=flood+runner+4+unblocked+games+66 PDF link annotation
    • https://cdn.sqhk.co/tatidukigag/cx5ohct/mens_hairstyles_thick_hair_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/hhhj3TL/kinowasonabogavija.pdfIn PDF document text
    • http://ruvenebigolusep.mywebcommunity.org/wadizaputanowir.pdfIn PDF document text
    • http://lugodapamaj.mygamesonline.org/98871748508.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/zojemazagexokelojevekow.pdfIn PDF document text
    • http://kimokabif.medianewsonline.com/winitaku.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/0StjfMK/rivitaxipo.pdfIn PDF document text
    • http://buyfastedcircle.xyz/sahih_bukhari_arabic_downloadzwsrd.pdfIn PDF document text
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/a5f60fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402501/normal_5feb78842aeca.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/iffpiCH/parent_zone_by_busy_bees_childcare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380883/normal_603b7e13a4067.pdfIn PDF document text
    • https://lufasewobomitod.weebly.com/uploads/1/3/4/7/134730449/gamuza.pdfIn PDF document text
    • http://fortuneo.biz/cuantos_litros_hay_en_un_cm_cubico7jumj.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/social_media_strategy_template.pdfIn PDF document text
    • https://cdn.sqhk.co/wixikinotu/fCgjPDu/leratuzakeva.pdfIn PDF document text
    • http://mofemaruwek.sportsontheweb.net/44938578007.pdfIn PDF document text
    • http://shoop-fe.ru/515832461227jp43.pdfIn PDF document text
    • https://migobagola.weebly.com/uploads/1/3/4/8/134874333/pamubirijisarij-pedunono.pdfIn PDF document text
    • https://vepibasizux.weebly.com/uploads/1/3/1/3/131380915/2822496afbbe926.pdfIn PDF document text
    • http://dobofozepop.mygamesonline.org/33099981155.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82B 5660 bytes
SHA-256: 2917635a623ca50697ddcb6d76168718c134e0256d89593d2a7777374740b2a1
font_01_sfnt_off0000fb69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB69 11240 bytes
SHA-256: e87cc34a98b165f0b64530bff1b1bbfef702c90097a260ad19f4a610a7d0993c

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