Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca6964f7eec147b…

MALICIOUS

PDF

103.3 KB Created: 2021-04-06 23:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 3aa3f0e4da43656bc9a8ffe4827d83de SHA-1: d80dfa556fedd72eff47ef6f34531940dfbbf3a2 SHA-256: 2ca6964f7eec147bc0849e1196ef6d4277f55acba94280f447d8d62ebd5d9aa9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm and by ML classifiers as malicious. The ClamAV detection further confirms its malicious nature, identifying it as a phishing trojan. The embedded URLs likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://druttle.ru/strik?utm_term=the+heiress+movie+philippines PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471082/normal_5ff8dbead0656.pdfIn PDF document text
    • http://bnl-jobs.com/stephen_king_it_1990_full_movie_freejccx2.pdfIn PDF document text
    • http://g2am2e.xyz/43552447298yds23.pdfIn PDF document text
    • http://lozuzaragujeb.mypressonline.com/tegek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459329/normal_5fc68f6d4bc6d.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/75926653178.pdfIn PDF document text
    • https://kubazabuz.weebly.com/uploads/1/3/4/8/134885093/6088286.pdfIn PDF document text
    • http://simcars.ru/breville_espresso_machine_repair_manualwv1is.pdfIn PDF document text
    • http://center-about.com/plant_design_and_economics_for_chemical_engineers_5th_edition_slidesharethkxz.pdfIn PDF document text
    • http://bred-enligne.com/how_to_show_that_oxygen_is_produced_during_photosynthesisbrg9v.pdfIn PDF document text
    • http://compte-cmbretagne.best/25589474327k9q2r.pdfIn PDF document text
    • http://afracheat6.xyz/20644229260zkwrs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_6016f7bca0b49.pdfIn PDF document text
    • http://5coupons.info/94696007069v002m.pdfIn PDF document text
    • http://naturaitalia.space/molewo9zqi.pdfIn PDF document text
    • https://midigoxu.weebly.com/uploads/1/3/4/0/134000126/9510086.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dogiwexor.myartsonline.com/latin_american_model_ap_human_geography.pdfIn PDF document text
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_7232b9735c384acb95c273e524778a62.pdf?index=trueIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/how_do_i_get_a_direct_deposit_form_from_my_bank.pdfIn PDF document text
    • https://f3b86e06-b3aa-4ee1-82f7-79049f3379a8.filesusr.com/ugd/0c4fd2_f85daffcc65141a8ba851a48a3be553a.pdf?index=trueIn PDF document text
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_39f87117cbbe455ebb8d9a74486586b9.pdf?index=trueIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_38fc6d6ef19e4e569d57127709128d7b.pdf?index=trueIn PDF document text
    • https://fecd0c08-032d-4b8b-b26c-6108aca7a00f.filesusr.com/ugd/a87c8b_a3f17a3ac1d64b4fbcbc7b153739faa6.pdf?index=trueIn 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_off00014086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14086 4192 bytes
SHA-256: 312636f562e11abeef82669518f93598670df42a49dba394c0c37739d65eddeb
font_01_sfnt_off00014f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F55 4856 bytes
SHA-256: ec421095b4fb96e7ab841a471b75af90b76a9984b16f05174f176d547df5a766
font_02_sfnt_off00015fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FB5 14508 bytes
SHA-256: f263a22bca1d32137bdf9c1f1522a1ae6b5862b0feb8836bdfa3237d1114a08a

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