Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ebc629b2d8dd298…

MALICIOUS

PDF

76.4 KB Created: 2021-05-10 23:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 82534c4666687ee46fcefc43fcb1d9bf SHA-1: e7a3e97be71cde6a3be1e8a65aa1223cc1c66884 SHA-256: 4ebc629b2d8dd2983205a059f604e8c2cea5c46c9b89a0bae208db65fce25608
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/strik?utm_term=p+type+and+n+type+semiconductor+examples PDF link annotation
    • https://cdn.sqhk.co/jeporikate/geUicuV/guputudefirujo.pdfIn PDF document text
    • http://jelusuvobirolen.mywebcommunity.org/44072731051.pdfIn PDF document text
    • http://kojijeku.mygamesonline.org/23859473507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464874/normal_604ad59d7400b.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/do_craftsman_jacks_have_a_lifetime_warranty.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423188/normal_6001424b68f8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497095/normal_603eb2751a3ca.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/weight_loss_diet_menu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412382/normal_5fc74388440a3.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/gchgJgc/kitupedu.pdfIn PDF document text
    • https://cdn.sqhk.co/rimudatige/EyDphgj/simple_splash_screen_example_in_android.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/aeiaaML/interesting_facts_about_human_body_in_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/wozulifudon/HiihcVC/56921618566.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393637/normal_5ffd5a486a6bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/samsung_rf267aers_troubleshooting.pdfIn PDF document text
    • http://sawurawefivovo.myartsonline.com/basic_category_theory_tom_leinster.pdfIn PDF document text
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_a3040a8f79484106a32ee8e12150d32e.pdf?index=trueIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_c34d974a8c2f4b498fb920e6ee2463f5.pdf?index=trueIn PDF document text
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_ac51cf82da01474fbf5fa417442b5d76.pdf?index=trueIn PDF document text
    • https://0c17d2ad-06a2-4efd-9128-26148cac6670.filesusr.com/ugd/44320b_b0d67f31671b4733917978ce2c245e67.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/falevi/large_cardboard_sheets_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/wotev.pdfIn PDF document text
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_66cc45bd703c41948fdd24b670da548e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE88 5392 bytes
SHA-256: 7024e7f833bd2cb2a5f2e929239ca383346db115fd8c68cd379a288bd3073796
font_01_sfnt_off000100ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CE 10336 bytes
SHA-256: 4ea00d049684e4aae7fcea1a28989df58f8a06156a2cdca5b42438269e503c5f

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