Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8382746e771f2d3…

MALICIOUS

PDF

80.9 KB Created: 2021-03-02 03:39:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8db7522a0ab9efa08f3e33c9f3b5ed7f SHA-1: fa757b26bc1091b042a8168b524bd8e1a674515c SHA-256: d8382746e771f2d377fb0da294f5a96d574f77a3a23ef55617798bfaff2ae298
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to search terms, directing users to external sites.

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://kuzutuzo.ru/wix?keyword=las+luces+de+septiembre+pdf+google+drive PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445343/normal_6001124ba3c3d.pdfIn PDF document text
    • http://pigexavenume.iblogger.org/pioneer_vsx-d514_manual.pdfIn PDF document text
    • https://wenojuzak.weebly.com/uploads/1/3/4/2/134265903/2850805.pdfIn PDF document text
    • https://cdn.sqhk.co/ganinidunop/hjnOq1y/fire_emblem_warriors_characters_list.pdfIn PDF document text
    • https://cdn.sqhk.co/widagawinud/ib7hcys/41292279164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480393/normal_601c700cd2e87.pdfIn PDF document text
    • http://wavosebiza.22web.org/pupuk_organik_cair_bonggol_pisang.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_601b5540106b4.pdfIn PDF document text
    • https://dinijituwit.weebly.com/uploads/1/3/1/6/131606252/8c0bb2b150cbc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495985/normal_5fe5d4c99aeae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_5fda933579f16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451971/normal_6029245d9947e.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/U6iKjaj/80061612451.pdfIn PDF document text
    • https://mizewipexu.weebly.com/uploads/1/3/4/6/134609608/0d1e12547.pdfIn PDF document text
    • https://dezojase.weebly.com/uploads/1/3/4/7/134711134/4931759.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407331/normal_60075c7330a58.pdfIn PDF document text
    • https://sivikowililip.weebly.com/uploads/1/3/4/5/134599649/4f1c9a4ea5ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kinutumuzikuji.epizy.com/why_is_whirlpool_fridge_not_making_ice.pdfIn PDF document text
    • http://dawonudugol.rf.gd/recurring_characters_in_midsomer_murders.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/soxakobesesefesikofo.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_off0000fab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB4 5616 bytes
SHA-256: 65b5262e89069b08bb74c70cfb4cbb364488dcb3753ef5e5a6b3e151fb25bcee
font_01_sfnt_off00010dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC0 11936 bytes
SHA-256: be6562ef8a9018a4eea5e925d9371aeed5835e0c024f26d1ac1dc4778fee8bed

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