Malicious PDF — malware analysis report

Static analysis result for SHA-256 262b87ef01f2446e…

MALICIOUS

PDF

73.2 KB Created: 2021-01-06 09:35:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b3ecff451e1ed9783cad29be0492017c SHA-1: dd95931f4fa55285378e10ae801d1a1d084ae385 SHA-256: 262b87ef01f2446ebeb6a98cd4fee526d8057d262ac89c4711b6cf53df09fcd7
244 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, and one link to known malicious redirector infrastructure. The document body, though truncated, suggests a lure related to 'free albums website', likely intended to drive traffic to malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=free+albums++website In PDF document text
    • https://xisaxori.weebly.com/uploads/1/3/5/3/135324705/pegoxisodizasoset.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/kuwekewugi.pdfIn PDF document text
    • https://burevojaziji.weebly.com/uploads/1/3/4/7/134729690/6691380.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/jehcjhQ/gitapirigasewofen.pdfIn PDF document text
    • https://rixafewokeget.weebly.com/uploads/1/3/0/7/130739987/2329313.pdfIn PDF document text
    • https://xesinuvukuwufo.weebly.com/uploads/1/3/0/7/130776104/e67e920f3350.pdfIn PDF document text
    • https://kaxepiset.weebly.com/uploads/1/3/2/7/132740291/2992901.pdfIn PDF document text
    • https://vugogirofezufus.weebly.com/uploads/1/3/4/3/134355312/gebuf_zotebakalowow_vixukod_wojulopodazem.pdfIn PDF document text
    • https://xanugobolenaz.weebly.com/uploads/1/3/4/3/134371028/kegegexaxito.pdfIn PDF document text
    • https://vidulegu.weebly.com/uploads/1/3/4/8/134897898/finolamezudo_panujegumejes_tubebalazobo.pdfIn PDF document text
    • https://ranuxibat.weebly.com/uploads/1/3/4/5/134595997/7880707.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe1f0a4-217b-4da9-befc-a35dd4b45e66/hamilton_beach_waffle_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cf0a821-c688-4460-990c-e24d862472ed/relacion_entre_inteligencia_y_pensamiento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/860cd2ea-9f47-4635-a52a-169d3d9f2cd8/menasat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/194a0c29-c119-48f9-8cd4-a98f539a3d01/ninja_cat_google_sites_unblocked.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_off0000e287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE287 5016 bytes
SHA-256: 6982bd299438e583bd9bffa33bd94f7f3f93c909d8942496010de8f554973aae
font_01_sfnt_off0000f38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38E 10772 bytes
SHA-256: 2fa0dd22902f9a871315251b332436296a4aba2a8b24764780bd4f169637a607

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