Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e14ea51a043e87…

MALICIOUS

PDF

73.6 KB Created: 2021-03-16 19:12:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dca7c5de8025abe97917b32e8a1b134f SHA-1: e626a4473498eaef94dcd85a11ccff35d0a878d6 SHA-256: 46e14ea51a043e877081de542b5082ebdd1a57fb0dd1f9bd8c261352b0044717
126 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to contain keywords related to the embedded URLs, suggesting a phishing or scam attempt. The primary malicious URL identified is https://dafemum.ru/strik.

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://dafemum.ru/strik?utm_term=how+to+connect+yamaha+soundbar+to+tv+remote
    • http://rasazajafatirek.mypressonline.com/89803734284.pdf
    • http://nubilofanekib.mygamesonline.org/6358557747.pdf
    • https://tejenopaje.weebly.com/uploads/1/3/1/1/131164027/vezalobegon_batas_mamepo.pdf
    • https://mologikonazo.weebly.com/uploads/1/3/4/7/134706863/ba4471d8c3be9.pdf
    • http://jukejed.mypressonline.com/61705214278.pdf
    • http://wikotimu.scienceontheweb.net/para_leer_al_pato_donald_resumen_por_captulos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://falepafi.epizy.com/what_is_knowledge_self_efficacy_in_education.pdf
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_54a30d023ae346fb8aac8798a187d452.pdf?index=true
    • http://viwuleraxukopiz.epizy.com/63958696863.pdf
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_22687f06816d448e9c99a6e6d78dd274.pdf?index=true
    • https://6a421494-2577-4416-904f-e17348f56b63.filesusr.com/ugd/85e76a_4e802363cafe43c8bf195cb263009041.pdf?index=true
    • http://kojodidekojamu.rf.gd/noweboluturaladisareb.pdf
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_98f277601de0423b801a54885eca3969.pdf?index=true
    • http://jilawovo.epizy.com/what_does_a13_mean_on_my_honda_civic.pdf
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_dda386f03b4541499fd2b60377ad6f66.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e115.bin
dc51f8ee8557b38a48e2d3521809c3aba4befbc6b989d079d83e8eabbd682bf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE115 5500 bytes
font_01_sfnt_off0000f3b7.bin
c3023f5b246bdf20d0640a8db7e32e0d6bf303b958b8131d6a14d486113e696b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B7 11056 bytes

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