Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d32dee96e0770ae…

MALICIOUS

PDF

92.7 KB Created: 2021-02-20 01:04:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7267f002e54d0ce863c5647f01553733 SHA-1: 21250224bdbc1c88d81d9ecb4562ac46d16c696e SHA-256: 0d32dee96e0770aede857d442517bbe6f3bd46a078652f8a3913f88c65c83f97
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifies this pattern, and the presence of external URIs further supports this. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/123?utm_term=military+to+climate+change+conference PDF link annotation
    • http://lnstagramverifiedbadge-form.com/23707680497bc2ls.pdfIn PDF document text
    • http://chelamela.org/wonuddkovp.pdfIn PDF document text
    • http://hookup158.fun/vemolaxawanetutp3le.pdfIn PDF document text
    • http://bellissimo.online/16521014574sty7w.pdfIn PDF document text
    • http://shoppermarket.online/wajuzusoranetn2vol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445735/normal_5ff6643ba5f38.pdfIn PDF document text
    • http://haustova.com/50046443502yexhn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_60238c272a31f.pdfIn PDF document text
    • http://kevogam.22web.org/information_overload_statistics.pdfIn PDF document text
    • http://winsl.space/94854149847t14h2.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://zefixufedinokas.epizy.com/chandrayaan_2_information_in_english_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/85078915652.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/husqvarna_55_chainsaw_manual.pdfIn PDF document text
    • http://sujetokotew.rf.gd/toccata_and_fugue_bach_piano_sheet_music.pdfIn PDF document text
    • http://latuwukatagowa.epizy.com/rozamijoso.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_off00011dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC5 5012 bytes
SHA-256: 8bc77b973b93f6aaef7e9cad1b81388580d8b213b2b02c78e92beeee454a246f
font_01_sfnt_off00012eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB0 12280 bytes
SHA-256: 63d5673d64c02662acd95881257fe92196cc162f3b4d0fcf8ce358b5891b6edc
font_02_sfnt_off000157c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157C9 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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