Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52dae8195be50e3…

MALICIOUS

PDF

73.6 KB Created: 2021-04-10 13:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 40e19765fcec3a9d150618eec6b60080 SHA-1: 71876844f538a80336185a32824fc9a57f1e4ffc SHA-256: a52dae8195be50e330c118d60618048d10f856f04a82438e74e5e09b4d4e6d0d
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 0.9995

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://kuzutuzo.ru/strik?utm_term=how+do+i+program+my+spectrum+remote+to+my+element+tv PDF link annotation
    • http://fawotewikobafis.iblogger.org/noxenikonigofiwibib.pdfIn PDF document text
    • http://itawegan.fun/android_emulator_for_win_7_64_bith1k2n.pdfIn PDF document text
    • http://idealica-italiaofficial.site/jifijunotifakotutekj5x7u.pdfIn PDF document text
    • https://cdn.sqhk.co/vapelomusanu/Z1sSpic/warpath_movie_review.pdfIn PDF document text
    • https://cdn.sqhk.co/sekijebasazi/dQ8KgfK/ccds_exam_study_guide_2018.pdfIn PDF document text
    • http://mandarin-fruit.space/59134522930v4is0.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/dUaLhfq/english_spanish_translator_offline_dictionary_download.pdfIn PDF document text
    • http://es50off.pro/ridifitogewedonogis271s4.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/id03hju/best_frosting_recipes_ever.pdfIn PDF document text
    • https://cdn.sqhk.co/bowevuva/jhigrgg/xumukubowubokibago.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/ejj7jdr/92884369094.pdfIn PDF document text
    • http://autokenn.com/what_is_physics_2034qnd.pdfIn PDF document text
    • https://cdn.sqhk.co/tawibonikigo/fS3fZje/93383082406.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dopodisimedu.epizy.com/metafisica_aristoteles_tomas_calvo.pdfIn PDF document text
    • http://riwexakax.epizy.com/ncert_class_12_biology_textbook_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c1b740-f865-4af8-96f9-f5e97700c6de/pride_and_prejudice_movie_2005_watch_online.pdfIn PDF document text
    • http://jidutibezerediv.rf.gd/doruxuwabosasonomevovira.pdfIn PDF document text
    • http://zotinebid.epizy.com/elliptical_arch_formers.pdfIn PDF document text
    • http://dizutobasuxolom.epizy.com/kesolavajupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca8b4c25-4cda-41c4-9e44-12fcbb373f23/kipekirofasukesuri.pdfIn PDF document text
    • http://sefogubijisep.epizy.com/labeseludotakigalej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d416b036-99e7-4b94-b0c9-f5a8c11e9ff8/what_do_you_call_a_person_who_is_sensitive.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_off0000e25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25C 5608 bytes
SHA-256: 04f061cb58f6403b2dc0d95cc0b717b2a0f5009e272461484e4298f0ddcbe216
font_01_sfnt_off0000f574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF574 10180 bytes
SHA-256: 7a9934ff170472cc06c9abb40b887b2b53cd5182ee283848202059f406a43960

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