Malicious PDF — malware analysis report

Static analysis result for SHA-256 f64ea70eb7829fb8…

MALICIOUS

PDF

70.3 KB Created: 2021-02-18 20:41:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 6614979aef22f2d0a3e61c47d124f87f SHA-1: b94ea02cef6e13b22f300e496f70eb4b879d8d35 SHA-256: f64ea70eb7829fb87ae815aaef320e6ff8a2985497a0ae3fa38e740f61719242
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, characteristic of a link farm or phishing campaign. The embedded URLs suggest an attempt to redirect users to malicious content or phishing sites.

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
  • 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://bologen.ru/123?utm_term=how+long+to+leave+splat+dye+in+hair PDF link annotation
    • http://idealslimitalia-oficial.site/fodavonosakakafghms.pdfIn PDF document text
    • https://dunokosira.weebly.com/uploads/1/3/5/3/135349308/resifaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/bafuberudod/egNP8Jl/56747228532.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/YwtEthd/cadena_100_lista_actual.pdfIn PDF document text
    • https://libadelalisam.weebly.com/uploads/1/3/4/5/134579317/561697.pdfIn PDF document text
    • https://cdn.sqhk.co/moxawitab/6ifgj4y/custom_gun_simulator_3d.pdfIn PDF document text
    • http://avbox.org/93739407073w86yt.pdfIn PDF document text
    • https://zalozudipob.weebly.com/uploads/1/3/4/6/134673455/fewubigidobutox.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/oTlhjPk/ponokegubunobuno.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/dZijvSb/gmod_legacy_addons_not_working.pdfIn PDF document text
    • https://gadonivoxe.weebly.com/uploads/1/3/5/3/135331758/7509667.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/somisilegex/context_clues_worksheets_11th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/small_funny_riddles_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/crio_9057_datasheet.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_off0000d414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD414 5436 bytes
SHA-256: 4d5efa074c5495261d15bbad5c65f316ea2c037f4dc58388653612cacbbf0b84
font_01_sfnt_off0000e6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A2 11232 bytes
SHA-256: ca8e8b2a8357efd7018a13b0a472e57332bcd2ee7add77e7155204fa1a05d8e1

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