Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe9942f87d183fb…

MALICIOUS

PDF

91.6 KB Created: 2021-03-21 01:11:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2225a2dc4e3e12f03d0150fa074fa5be SHA-1: bcb1451ddc9a40d9a86614ef1f0e115658ce9d47 SHA-256: cbe9942f87d183fbf32e3bfd75c9098a6e4cd068bf708d366c20c965fe729a9b
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 flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains references to "Green Bay Packers PDF" and the authoring application "wkhtmltopdf", suggesting a lure. Numerous embedded URLs, including one pointing to "fokemale.ru/award", indicate an attempt to redirect the user to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/award?keyword=green+bay+packers+pdf PDF link annotation
    • http://luminar3-download.xyz/pezoxajikifedutewibodi0do60.pdfIn PDF document text
    • http://sberpodarok2020.online/43865513694pwrud.pdfIn PDF document text
    • https://cdn.sqhk.co/rudixika/aiiqJBN/carpet_cleaner_home_depot_rental_reviews.pdfIn PDF document text
    • http://livethailand.fun/42776444850mzui6.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/ieicJhi/1233881595.pdfIn PDF document text
    • http://bugivaf.22web.org/game_of_life_electronic_banking_rules.pdfIn PDF document text
    • http://muwazowezijowa.22web.org/measurement_of_length_physics_lab_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/rotonoba/jijdxjF/bubanowusinamibif.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/ha0aii5/korajojorime.pdfIn PDF document text
    • http://datinge.site/how_much_does_monat_pay_you36rir.pdfIn PDF document text
    • http://official-win.xyz/94069114442t3y48.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kajifota.epizy.com/aliments_acides_et_basiques.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/4016275569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/331d5f2d-57a8-4d9b-90de-87fbdf564edc/storm_the_beaches_ddo.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/samsung_tv_un32j4000af_stand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffebca48-30cd-4451-9afb-dbf443aec0b4/mukumog.pdfIn PDF document text
    • http://mifazafodig.rf.gd/behaviour_therapy_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/860ba3c4-e44a-4421-8d03-f9893d983217/24349191316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c899b8f3-2ba8-4dee-8bf5-0a31ab814ed1/9222969201.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a975da76-712b-4eb2-a90b-e16a9cd2e2e5/genaxavegom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6649d57-522c-4473-b93c-381598cafd7f/73703686996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c41499-dcfa-4795-bc52-1e95cae3b586/kenmore_air_conditioner_remote_code.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_off0001264e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264E 5456 bytes
SHA-256: 05d400ca9bb2fff44a0839d458f36fbfb4bbd8168fc7e44172c23378e6e76b24
font_01_sfnt_off000138f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F7 11896 bytes
SHA-256: 810149dc3d56453db9c58b4ec799b6c7dd6464a4c84c2fcb4dc260e30e6162f8

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