Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00a8d2fb9c63da9…

MALICIOUS

PDF

72.8 KB Created: 2021-02-27 20:54:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 980ea182232027730e4e71ee6c8870b9 SHA-1: 7ed25edb3626b12c9bdd4e0474f1b9616b883860 SHA-256: d00a8d2fb9c63da903389fdbe92bf7a090ff87f1887997ca3333b0ac13cdbe86
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://ponafet.ru/wix?keyword=6.4-6.5+practice+similar+triangles+worksheet+answers PDF link annotation
    • https://pulisojoperun.weebly.com/uploads/1/3/4/4/134487891/790897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416151/normal_5fdae424c3263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374978/normal_602204a344355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405420/normal_5fe6aea318b6a.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/sjgYiav/75731490089.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454435/normal_6028318d768fa.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/p8bjaqI/jikoroguruvinirobew.pdfIn PDF document text
    • https://cdn.sqhk.co/kukugejekibi/cjf8bI2/23483835849.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/N2hiia8/spirited_away_dragon_drawing.pdfIn PDF document text
    • http://ponarolo.22web.org/10665562044.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/ggYCFgd/learn_spanish_to_english.pdfIn PDF document text
    • https://guwubujurod.weebly.com/uploads/1/3/1/4/131438509/bc25dc56c93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414153/normal_5fcf318deeb35.pdfIn PDF document text
    • https://jadotonevuwupu.weebly.com/uploads/1/3/1/4/131407011/vutijobi.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
    • https://s3.amazonaws.com/musoxifuvitalo/lagu_5sos_amnesia_uyeshare.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_off0000d0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DF 5624 bytes
SHA-256: e6da64893ae77d729e08d18f6ee6db0abd354d97f17335b8db4dfe71194e7d7d
font_01_sfnt_off0000e3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E7 10332 bytes
SHA-256: 4cf7ca25354e5be6de206f070c4290e90db9f45bfdc2de47fc82641b1562f63d
font_02_sfnt_off00010758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10758 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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