Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d80dff727894a6d…

MALICIOUS

PDF

74.0 KB Created: 2021-05-03 13:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 574d4f6fd9c44371ac94da9ab1d8fa64 SHA-1: 5cc0b8bbb9625ee3ff1a84e2f27144f146356951 SHA-256: 2d80dff727894a6d05f804f605288bee55656f756e030e2b4a3cda8d2968b1fe
184 Risk Score

Malware Insights

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

This PDF document contains numerous links to disposable hosting domains, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to shipping inquiries, aiming to trick users into clicking malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=does+usps+provide+tracking+for+first+class+mail In PDF document text
    • http://dufasobogunojat.22web.org/bachelor_s_degree_in_information_technology_requirements.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368487/normal_5ffa69b122ca2.pdfIn PDF document text
    • http://goodsun.fun/70344563126eff2v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460233/normal_5fc60f820671a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415300/normal_601bb8a2d5aa9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506063/normal_5fdd220020995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370280/normal_6018a4c4d7dd0.pdfIn PDF document text
    • http://winfreeiphone.xyz/best_nasheed_2020_offline_action_gamess7efc.pdfIn PDF document text
    • http://icub.tech/the_prince_of_persia_full_movie_free_downloadp195m.pdfIn PDF document text
    • http://tactical-jacket-sale.shop/11764621045hyn2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_603674bb25883.pdfIn PDF document text
    • http://afracheat7.xyz/sowafokeperagk6ye0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mazizinopuki.rf.gd/ruger_sr22_rifle_upgrades.pdfIn PDF document text
    • http://nologivarikej.epizy.com/acidosis_metabolica_cronica.pdfIn PDF document text
    • http://bitediwufekoxem.epizy.com/47170712993.pdfIn PDF document text
    • http://mulusatore.rf.gd/kiwufitilosinugi.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_off0000e35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35C 5600 bytes
SHA-256: 20a347174941ad3380c54e28a188691799038f6e9c503ce75988a733ffc3e0a2
font_01_sfnt_off0000f66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66B 10688 bytes
SHA-256: 105b5dcbccc17182545e689123898c0f606d142b41ac44192f38e024e8652926

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