Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae001a9a23d26ad…

MALICIOUS

PDF

76.7 KB Created: 2021-02-21 01:33:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5ad601fea53a66d94308858117d1bb62 SHA-1: 15c973ca867b71d394937acb285ba30dd1d43903 SHA-256: fae001a9a23d26ad84b760398dd591be5d6c31d9b71460da8a7f0cf5e9ec3413
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary one pointing to 'baarspo.ru', suggesting a lure to a malicious site. The document body, though heavily obfuscated, contains text related to games, reinforcing the lure. No scripts were extracted, but the PDF structure and URL analysis strongly suggest a phishing or malware distribution attempt.

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=unblocked+mario+crossover PDF link annotation
    • https://cdn.sqhk.co/fawabanof/10jhfhf/wordox_free_multiplayer_word_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368227/normal_5fcfe82d751d3.pdfIn PDF document text
    • http://lady-bug.club/cinderella_and_four_knights_ep_6_engi73ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501634/normal_600d3498f191a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367964/normal_5fe194a33c695.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389108/normal_602ebc07bbfc0.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/KOSuhba/dalefizofi.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/iivJV6Z/30515172259.pdfIn PDF document text
    • https://cdn.sqhk.co/bilexodofose/hhR86ii/west_game_ios_review.pdfIn PDF document text
    • https://cdn.sqhk.co/bitubebo/iibjdhi/super_boy_adventure_world._adventure_island_tampa.pdfIn PDF document text
    • http://doctora.club/89528475044dvov5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375204/normal_602c4aaf2e895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404980/normal_601e3ae7596ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxumev.epizy.com/sajakinoselures.pdfIn PDF document text
    • http://duposul.epizy.com/xegisikutafup.pdfIn PDF document text
    • http://wexodunevejuwa.epizy.com/what_are_the_theories_of_environmental_ethics.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_off0000f02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02B 5340 bytes
SHA-256: d9ebbd8fb103c01316c8ff0f4905e2b5c8c2aa6f2aed207bd5fd4f762cfeed04
font_01_sfnt_off00010241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10241 10328 bytes
SHA-256: 79e14eba81e305d0f97bbe0ca1b6afb3f4b29820b2bd78315eed9b67c4f925d4

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