Malicious PDF — malware analysis report

Static analysis result for SHA-256 45bfc95663f1eb9c…

MALICIOUS

PDF

76.6 KB Created: 2021-04-11 20:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 65aeb531c38426e2d6616282af1c4f44 SHA-1: d53bcb49e31b8fc04cd9d4eb51455317d7f183c8 SHA-256: 45bfc95663f1eb9c474ba9bacd486f6cbad1b83d9ce76019ebeec9a6cf1d219b
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The embedded URLs and the document's structure indicate an attempt to disguise malicious activity as legitimate content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=python+learning+path+for+beginners PDF link annotation
    • https://welirupew.weebly.com/uploads/1/3/4/6/134662060/xoxabatisilaxun-robotu-mazijafebit.pdfIn PDF document text
    • https://vurinilobato.weebly.com/uploads/1/3/1/4/131454355/4011314.pdfIn PDF document text
    • https://zokexeti.weebly.com/uploads/1/3/5/9/135966989/dulepiwapowoz.pdfIn PDF document text
    • https://kulufitobapesad.weebly.com/uploads/1/3/4/4/134443603/d934c631e86e66.pdfIn PDF document text
    • http://tofofupetofido.iblogger.org/systolic_pressure_variation.pdfIn PDF document text
    • https://jerewerek.weebly.com/uploads/1/3/5/3/135349205/gozazalavakozu_laposazima.pdfIn PDF document text
    • http://wivevemeb.scienceontheweb.net/seguridad_jurdica_unam.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/47114450307.pdfIn PDF document text
    • https://posilopawirina.weebly.com/uploads/1/3/4/3/134353572/43135.pdfIn PDF document text
    • http://lebanage.iblogger.org/nuzosakofagirezefoxeto.pdfIn PDF document text
    • http://rabiwitijif.medianewsonline.com/tixutadafigugavilifila.pdfIn PDF document text
    • http://pekibexuvipeve.scienceontheweb.net/65109550919.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/abbyy_finereader_12_manual.pdfIn PDF document text
    • https://bixowupe.weebly.com/uploads/1/3/1/4/131409305/1373286.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_c961b4bf40bc4b68badb0623b18a27f7.pdf?index=trueIn PDF document text
    • http://bitoxip.epizy.com/96111110937.pdfIn PDF document text
    • http://kititone.epizy.com/zelap.pdfIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_7733683ec306451f807ba5ffa347c3ae.pdf?index=trueIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_1647bc0e87324e398e48642f2041a3ae.pdf?index=trueIn PDF document text
    • http://vajavugozuw.epizy.com/paxefufesebexokuletota.pdfIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_8bdb98908f7c445db4d9b23f7831dfd0.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_off0000ec4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4D 5408 bytes
SHA-256: 8f8ede4846b7472364985d1417e4f38943af7f1e6d4185129a5de93ad517b05d
font_01_sfnt_off0000feb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB5 11116 bytes
SHA-256: ec4fbdf34c50ebe88af0612599f424efe45d327e37a4f2c09ddd689680fa1738