Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6bce42dadb33995…

MALICIOUS

PDF

73.9 KB Created: 2021-01-21 06:18:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a721487030464765ad7b318840bdc235 SHA-1: de8ed9dd74814070f02e847b2bf7e26ea6dc4bc5 SHA-256: a6bce42dadb33995efcd79cc8c9ea4b94421eb70ae6a6fbfd900f00b1391620a
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, with at least one pointing to a domain associated with link farming and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

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://maypoin.ru/123?utm_term=what+does+motion+media+meaning PDF link annotation
    • https://site-1196306.mozfiles.com/files/1196306/mountain_bike_helmets_reviews_uk.pdfIn PDF document text
    • https://site-1179918.mozfiles.com/files/1179918/87883884656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5fe8908527d59.pdfIn PDF document text
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/xazanizifodiso-jigamaxe-sulunezejekex-tuvojusoxidifo.pdfIn PDF document text
    • https://site-1175763.mozfiles.com/files/1175763/99156334148.pdfIn PDF document text
    • https://site-1176519.mozfiles.com/files/1176519/pc_games_black_friday.pdfIn PDF document text
    • https://site-1175399.mozfiles.com/files/1175399/magic_snake_twisty_puzzle_toy_instructions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379612/normal_5fc52032a61e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370737/normal_5fcbd550b6373.pdfIn PDF document text
    • https://site-1247725.mozfiles.com/files/1247725/climbing_aconcagua_unguided.pdfIn PDF document text
    • https://molawaxurot.weebly.com/uploads/1/3/4/6/134699933/lazivavefiz_texofofunabixo_raligibupuvudi.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/nizuzuma_vowozopinaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489975/normal_600346f47811d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bopebewi.epizy.com/6773764081.pdfIn PDF document text
    • http://gadusevi.rf.gd/child_protection_policy_template.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_off0000e599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE599 5124 bytes
SHA-256: 234703b010dcb44104e6fc57ef15b91135b7249479e270579afcf9edc4cefd60
font_01_sfnt_off0000f6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F0 10532 bytes
SHA-256: a541dcf999a2ebf1ca83b64aefcc1c810ecb6334787f33a00ce0df09f3297ee9

Open this report in the interactive analyzer, or submit your own file for analysis.