Malicious PDF — malware analysis report

Static analysis result for SHA-256 2089b694afb49e10…

MALICIOUS

PDF

89.9 KB Created: 2021-03-29 06:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: baed331cbb966b39461db979d92bde54 SHA-1: 0554031fd8c9896e16c34271e148d758f8ef05fa SHA-256: 2089b694afb49e103d7b17b858082ffc4ab938bedfd33fff85d057b18ce1ae95
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=netgear+wndr3700v2+specs PDF link annotation
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/80b14c.pdfIn PDF document text
    • http://myfavoritesun.xyz/7814310756b2nf6.pdfIn PDF document text
    • https://liwetevafiwa.weebly.com/uploads/1/3/4/0/134096648/tivowojaxuderowodub.pdfIn PDF document text
    • https://xopavomubikun.weebly.com/uploads/1/3/4/8/134879687/wobomowuwarija.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387702/normal_605ae31a29d8e.pdfIn PDF document text
    • https://rezibaxuxemabu.weebly.com/uploads/1/3/1/4/131453555/wazikidabativedepa.pdfIn PDF document text
    • http://omerkatanalp.com/a1c_and_blood_sugar_levelsktj4s.pdfIn PDF document text
    • http://domainlimax.xyz/sodasegomoxorotddty.pdfIn PDF document text
    • http://trokot-shtorki.online/business_clicker_apks8i07.pdfIn PDF document text
    • https://xitodilizunew.weebly.com/uploads/1/3/4/1/134108755/zafutusigizole_mudabozavumuri_xogoregavomo_gojad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459034/normal_6027cce364f67.pdfIn PDF document text
    • http://car-den.ru/brownie_uniform_size_guide_in_agesu96mx.pdfIn PDF document text
    • http://rosativiwam.mypressonline.com/bakopesisavakisoruragomu.pdfIn PDF document text
    • https://gopaposoxawa.weebly.com/uploads/1/3/0/7/130740193/rerokavafano.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nodezolejew.epizy.com/4292240515.pdfIn PDF document text
    • http://jotudokizer.onlinewebshop.net/72508406294.pdfIn PDF document text
    • http://vemesivudaro.epizy.com/definition_of_leadership_2020.pdfIn PDF document text
    • http://velevemi.epizy.com/pivifovisikitorafa.pdfIn PDF document text
    • http://badugumafuzalij.rf.gd/61258119123.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_off00011179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11179 5848 bytes
SHA-256: f09b2838f685a7eeefbc432e3c52b4e2650124c347d9c9ff23b92d27c7e9659e
font_01_sfnt_off00012596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12596 16656 bytes
SHA-256: 5fb4a20d217bdacc8e41e65cfcc2a6005f8b7de96fe2b6dcfc28bdc8130c10e5

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