Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb483b0e793d1272…

MALICIOUS

PDF

69.2 KB Created: 2020-11-11 19:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7506a4b7a67d74ec8fa60b6a53d08dad SHA-1: d3755e32034c7c879b3b4a9737a983afed6971bb SHA-256: eb483b0e793d1272bb73753f0753fa6c2a21807754ccf9eae4a57bdc67061a79
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The document contains a large number of embedded links, suggesting an attempt to direct users to external, potentially harmful, websites. While no scripts were explicitly extracted, the nature of the embedded links and the ML classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?utm_term=radical+expressions+and+rational+exponents+answers
    • https://kegozogoro.weebly.com/uploads/1/3/4/5/134525602/nurapemepabewek-fakafuli-jesitowaka.pdf
    • https://xawiwewediwo.weebly.com/uploads/1/3/4/0/134017039/ralijadojugakib-bakuv.pdf
    • https://zofigaxukinepir.weebly.com/uploads/1/3/4/2/134235574/wudevipoxeluwim_redomefuxekizov.pdf
    • https://reredutubonuki.weebly.com/uploads/1/3/0/7/130775370/wudizovi.pdf
    • https://davavenetu.weebly.com/uploads/1/3/4/5/134500413/pozadulukeduzoz-sifawimiruduvix-gadozalebu.pdf
    • https://novedoxax.weebly.com/uploads/1/3/4/5/134512377/c0d129c77.pdf
    • https://kumusexowefas.weebly.com/uploads/1/3/2/7/132741352/9722d994.pdf
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/nezigubakobog.pdf
    • https://bososafevibusup.weebly.com/uploads/1/3/4/0/134041518/6100358.pdf
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/990c3668.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jakujakula/kifedupimedodapaw.pdf
    • https://s3.amazonaws.com/fujadabez/xijage.pdf
    • https://s3.amazonaws.com/belapawerezuju/78223307521.pdf
    • https://s3.amazonaws.com/fenatagazise/72242025327.pdf
    • 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_off0000d0e7.bin
e76cc3e8cc14fe89da9d679be65f91b7353ce6163db167ae468ececa68b15ae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E7 5232 bytes
font_01_sfnt_off0000e2dd.bin
7b3968d4cc7b8d8cbde0e09573ba007dce378e4674bdfdcde7394feb4d86fe4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DD 10124 bytes

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