Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2257d67951aa67…

MALICIOUS

PDF

73.3 KB Created: 2021-02-28 21:41:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 49c764a7c2e395a2f699b975d5c5cc6f SHA-1: b5b1ee3d654854610a8103c3537335ed0d1a763d SHA-256: fa2257d67951aa67c87ccff05b3ff925987dcc932470808d32be12ea75623083
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 0.9991

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://jumiwimov.ru/123?utm_term=worksheet+on+landforms+for+grade+3 PDF link annotation
    • http://zuvilivupeke.iblogger.org/19005636990.pdfIn PDF document text
    • https://cdn.sqhk.co/savaketiju/0rhbnhg/86256520117.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/jfhijjq/sopem.pdfIn PDF document text
    • http://rewita.fun/curado_de_carnes_en_salmuerav3bfd.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/dUhecie/12236572087.pdfIn PDF document text
    • http://pubguckazan.com/37859374176wb494.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446151/normal_5feb083640958.pdfIn PDF document text
    • http://xupevagadozojad.22web.org/kevozopovetubixovonexaf.pdfIn PDF document text
    • http://nonretloli.site/9502460603664o7l.pdfIn PDF document text
    • https://cdn.sqhk.co/mejofiwog/W8nrSuy/vufaroluziwubi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497131/normal_6011900b8be7c.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/ihzhfxl/kobetiras.pdfIn PDF document text
    • https://cdn.sqhk.co/dilipokoje/qhbgeL9/friend_finder_app_for_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409258/normal_60302bb4ad1c4.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/jejgiRg/manegejezavugazek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453741/normal_6012701f5b895.pdfIn PDF document text
    • http://hempmap.ru/does_lg_revere_3_have_a_sim_card1l8uz.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/sukedil/dnd_5e_warlock_guide_2019.pdfIn PDF document text
    • http://gejorefirizo.epizy.com/tagonipoko.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/punctuation_marks_and_capitalization_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/zeriten.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/coordinating_conjunctions_in_spanish_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/59429114176.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_off0000d5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C8 5304 bytes
SHA-256: 906aa9821868d36c98be619f1af280849d814af19b8e0acdf505a2aeea9cb7d8
font_01_sfnt_off0000e7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B7 10012 bytes
SHA-256: beab8eb6acda0d77d6d51929d4dd43d0feee69e2c293b690b7fd0736c734b6ea
font_02_sfnt_off000109c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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