Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac45fbe4752edf2c…

MALICIOUS

PDF

82.4 KB Created: 2021-04-16 21:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 54d3ee97b3770e5964a39b34476e0b7b SHA-1: 51b9475c87bc43f71cb8223e32100602424566ea SHA-256: ac45fbe4752edf2c13afd4650e7df275b75a2ebba709952accc5a6249c08cf96
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://botokaw.ru/strik?utm_term=olympus+om-1+hearing+aid+battery PDF link annotation
    • https://fegowudabe.weebly.com/uploads/1/3/1/4/131438077/rovowuzeredopojawugu.pdfIn PDF document text
    • https://fibavizenimi.weebly.com/uploads/1/3/4/4/134485548/bb96f.pdfIn PDF document text
    • https://lolivifi.weebly.com/uploads/1/3/0/7/130739590/tawosepomalan.pdfIn PDF document text
    • https://nabokopawupanav.weebly.com/uploads/1/3/0/7/130739772/9218344.pdfIn PDF document text
    • https://sawifumoz.weebly.com/uploads/1/3/1/3/131380604/nukofigavadower.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372354/normal_6008c32555dd9.pdfIn PDF document text
    • https://losazutuliwuja.weebly.com/uploads/1/3/4/6/134622760/68707d9c73a.pdfIn PDF document text
    • https://cdn.sqhk.co/dedejosewor/uBgcG9c/virtual_families_lite_2_cheats.pdfIn PDF document text
    • https://fepagefifumowa.weebly.com/uploads/1/3/2/6/132681901/5048a166dbb.pdfIn PDF document text
    • https://jezemubo.weebly.com/uploads/1/3/6/0/136094449/baxixaturipapave.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/7c68574cd1.pdfIn PDF document text
    • http://tebeririz.scienceontheweb.net/bye_laws_of_society.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418166/normal_604d1327a9184.pdfIn PDF document text
    • https://xananitape.weebly.com/uploads/1/3/4/0/134095977/76f114fbcfc.pdfIn PDF document text
    • https://cdn.sqhk.co/roduxokixuzi/b5jeZge/sijunoronokabataw.pdfIn PDF document text
    • https://fenorepaxok.weebly.com/uploads/1/3/1/8/131856491/9b86ff4c.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/WtISggo/jisumelexis.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/54741944294.pdfIn PDF document text
    • https://tosulabemolajeg.weebly.com/uploads/1/3/1/8/131871730/rezif-zanosipuguran.pdfIn PDF document text
    • https://senuwisaf.weebly.com/uploads/1/3/4/0/134018119/pelozokesamu-kimafokowogoxex-nofatomurabuki.pdfIn PDF document text
    • https://wafanipo.weebly.com/uploads/1/3/2/6/132695839/dameposa.pdfIn PDF document text
    • https://dutudofedibajun.weebly.com/uploads/1/3/2/8/132815365/xirivukove-jemefoko.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001019c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019C 5724 bytes
SHA-256: e91bb9b46d769698c79b2afa305a4a6ead6bffdb28ad9cc37bdcaf3fdceed283
font_01_sfnt_off000114f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F0 11512 bytes
SHA-256: 858b27f1d94951f7ca4ce782e75e651cc72befc91088aabe269a34b0f72f5788

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