Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c8002db0b26e2fc…

MALICIOUS

PDF

75.8 KB Created: 2021-02-23 16:26:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7a292779c52fc13b65746a2a15c2ad84 SHA-1: d98a6c2fec8f59f923e8e2e911a42e8ca9fe58cb SHA-256: 8c8002db0b26e2fc53246cec96bea310b882384ba4f1996d3fa81e9d4db1f966
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely as part of a phishing campaign.

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
  • 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://baarspo.ru/wix?keyword=react+cannot+read+property+of+null+state PDF link annotation
    • http://deflecfcvy.best/nuwalamaxapobemv07.pdfIn PDF document text
    • https://cdn.sqhk.co/dowamagova/iaMcLzl/dragon_spirit_arcade_online.pdfIn PDF document text
    • http://poverkavoda.website/what_are_the_12_elements_of_music_and_their_meaning2p83f.pdfIn PDF document text
    • http://crubr.space/cuanto_equivalen_2_pulgadas_a_mm9pqeh.pdfIn PDF document text
    • http://iranianvc.com/rae_diccionario_panhispnico_de_dudasmjy88.pdfIn PDF document text
    • http://pubgmobiie.com/6350655097fe8h7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410018/normal_601a2fb50b8b1.pdfIn PDF document text
    • http://magicwoolshop.com/55618171623wtvus.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/Djdjft0/idle_air_control_valve_replacement_cost_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/jhibjgr/9778610618.pdfIn PDF document text
    • http://goodnaturak.space/50524225862o0bv9.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/Nrnrqhj/37408137032.pdfIn PDF document text
    • https://cdn.sqhk.co/kefekawit/igijcFa/42349138746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502920/normal_600e22e534119.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://tidewoxawutose.epizy.com/60894985095.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAD 5092 bytes
SHA-256: 082ecb2c13adeb140e98939671d7511e7952ecf0ac12f85b8a341b7da62f708b
font_01_sfnt_off0000e111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE111 16052 bytes
SHA-256: 04b3b69feddee5ff3d2d1ee807c666f2f3ffb8a947140b342cc42fe81b601088
font_02_sfnt_off000111f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F9 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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