Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc564af481ee816…

MALICIOUS

PDF

73.7 KB Created: 2021-02-12 00:51:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1c1553e2d67f24630801199bf97ac44b SHA-1: ce355a177237106aad596d5e5a734072ee54f604 SHA-256: bbc564af481ee816b5609b4e93c04a29a2d3d66b5af516d201ce23c6ab7ed4fc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://seumenha.ru/123?utm_term=optical+network+terminal+vs+modem PDF link annotation
    • https://cdn.sqhk.co/xuwifoviwalo/oijdChi/rush_limbaugh_podcast_youtube_july_15_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381766/normal_601a9e651b2d5.pdfIn PDF document text
    • http://cccckkkkkdd.space/kavokike84rx3.pdfIn PDF document text
    • https://cdn.sqhk.co/sawitofi/KgeQ5jf/45186907140.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/iwgjgfM/expanse_season_2_episode_6_review.pdfIn PDF document text
    • http://gravkamen.ru/bulejitijawiborelisi2fgfo.pdfIn PDF document text
    • http://my-credit.info/zivejuvero3l6kw.pdfIn PDF document text
    • http://rp-youtube.fun/6260187096jhcc2.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/iexGgif/angry_birds_2_game_download_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/Jmc9nif/futimisizidi.pdfIn PDF document text
    • http://czecheducation.space/gidewekonusuzegevo7so31.pdfIn PDF document text
    • http://shtancircul.site/vector_2_game_mod_apk_free_downloadfvn8r.pdfIn PDF document text
    • https://cdn.sqhk.co/dojarodawiw/geLKlih/forza_horizon_3_mobile_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/uAjhgih/72757890346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468294/normal_601855e6166ce.pdfIn PDF document text
    • https://cdn.sqhk.co/kulukopupiw/cigUgji/rudulofosupufur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F6 5460 bytes
SHA-256: 1fc159e49ecd36c168e6bd54cc9797e0129c422635694a4ac38d653f0b1d9187
font_01_sfnt_off0000f585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF585 10520 bytes
SHA-256: d12556d8b09785560a9fb5acbf033575b500bb235bf73dd5a35201db9ce7223f

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