Malicious PDF — malware analysis report

Static analysis result for SHA-256 781f03a7b0a9485f…

MALICIOUS

PDF

80.9 KB Created: 2021-04-09 04:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aa808d02c2677f319bc7d27c833e6b0b SHA-1: e884fd13a1ce8b891de60ed5183fa75c40860212 SHA-256: 781f03a7b0a9485fdf28c235e45d2fd672d6cb0c4cd7890d1434b41d8e7335ed
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The embedded URLs suggest a phishing or scam attempt, likely aiming to redirect users to malicious sites for further exploitation. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=el+diario+de+greg+online+espa%25C3%25B1ol+latino PDF link annotation
    • http://fruktovik.com/danovujewafovqs4o8.pdfIn PDF document text
    • http://top-agent.ru/jevitebobifamalizuguruva70xvc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425917/normal_6007936d0ef75.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/los_juegos_del_hambre_sinsajo_parte_3_reparto.pdfIn PDF document text
    • http://xruhdfo.site/order_acknowledgement_template_wordxjqud.pdfIn PDF document text
    • http://santaparker.store/my_explorer_wont_startydfq2.pdfIn PDF document text
    • http://trikolor.site/939882430621i3wu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495387/normal_602ec93f920c5.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/what_is_slicing_the_pie.pdfIn PDF document text
    • http://wexypay.icu/vesowunesofabeserojejams754w.pdfIn PDF document text
    • http://xutefizil.getenjoyment.net/52009650484.pdfIn PDF document text
    • http://snegny.com/82903209264yv081.pdfIn PDF document text
    • http://khanapoorti.com/pac_man_ball_game_systemzibt8.pdfIn PDF document text
    • http://dumigegin.medianewsonline.com/97741290002.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/bisegilupuf/vatizerupebipat.pdfIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_61155ce0db96415ea5444277fdb8cc12.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gulapore/espn_tv_guide_now.pdfIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_61b6a00812cc4da3aabe828a38b8d593.pdf?index=trueIn PDF document text
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_4e678b34c286407fb8c1ccd7a812b9e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/finding_gcf_worksheets_for_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/96145610648.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_off0000ebf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF6 5084 bytes
SHA-256: 6322f6abdf614d4909d129265a9956cadd7844c5a8b40561800121b31e2d7029
font_01_sfnt_off0000fd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD09 12708 bytes
SHA-256: fe2c12a55b9f9fe43e1efddb32ab360759a7fa60a6a1f2297cab9d78db6cb75c
font_02_sfnt_off000125d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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