Malicious PDF — malware analysis report

Static analysis result for SHA-256 49371ada97b47874…

MALICIOUS

PDF

76.3 KB Created: 2021-05-06 22:27:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6c782dd66f6671f04c3e9e0db5522c57 SHA-1: dd8fc64d99a2d0073042543c24e91fbef352ccd4 SHA-256: 49371ada97b478741f312181e5a410d26e94b6ef120c787edd40751e2cc00c3d
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 embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely as part of a phishing or malware delivery campaign.

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://dugedepap.ru/strik?utm_term=the+end+of+the+f+world PDF link annotation
    • http://kakorixow.mygamesonline.org/wordly_wise_3000_book_8_answer_key_lesson_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459784/normal_603eaa9f4f443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_60646051273ef.pdfIn PDF document text
    • http://kamini33.ru/xidosafewaradlk2tf.pdfIn PDF document text
    • http://tomandbxof.site/44238984080rdkz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451754/normal_5ff9c09c7e4a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381547/normal_6027668b49f19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xojazexodiwosi.epizy.com/253_recettes_de_cuisine_algrienne.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/what_is_in_dominos_white_sauce.pdfIn PDF document text
    • http://lopafulobitap.atwebpages.com/35168060542.pdfIn PDF document text
    • http://puwegobatove.epizy.com/atonia_uterina_signos_y_sintomas.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/blue_king_size_fitted_sheet.pdfIn PDF document text
    • http://zezuwolajo.rf.gd/makotenebili.pdfIn PDF document text
    • http://rizivubonulej.atwebpages.com/sword_art_online_alicization_lycoris_gameplay_deutsch.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/how_many_bats_can_live_in_a_bat_house.pdfIn PDF document text
    • http://xovebezot.rf.gd/fesurumimoloruxebaso.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_off0000ee6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6F 4648 bytes
SHA-256: 6527b36b204934ae196f58cf5c4d6d1648276542c4559b54e113643fa030feab
font_01_sfnt_off0000fe4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4B 11172 bytes
SHA-256: 3f8a6876b8b9fa13e21a87a7434e36609b2662b09fe06d0ff58b393575ea730e

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