Malicious PDF — malware analysis report

Static analysis result for SHA-256 6878d9233b120ad5…

MALICIOUS

PDF

76.5 KB Created: 2021-03-13 21:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 48dbb5ea553a99f951a788317a48ed6f SHA-1: 2dd0d8fc5a0d636a564b027bc64ce192749179cf SHA-256: 6878d9233b120ad5d178ac4d4209c522eafb2ec09c1fb790b297662171a6fd13
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one pointing to 'bologen.ru', which is flagged as an external URI. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document's structure suggests it's part of a link farm designed to redirect users to potentially harmful 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://bologen.ru/wix?keyword=eve+super+ratting+guide PDF link annotation
    • https://cdn.sqhk.co/gufojakig/rigg4gf/timis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476416/normal_600547e9251e3.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/6cf25ba.pdfIn PDF document text
    • https://toroxamaje.weebly.com/uploads/1/3/4/0/134017611/zabot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496165/normal_60351e3c5b52e.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/fjcgjhb/lynx_bus_times.pdfIn PDF document text
    • https://pudijamarotu.weebly.com/uploads/1/3/4/0/134000536/tipujodina.pdfIn PDF document text
    • https://milubede.weebly.com/uploads/1/3/4/3/134349056/pomapadovimebi.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/gShdhht/62469423372.pdfIn PDF document text
    • http://wunadimizurened.medianewsonline.com/82908948089.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/67022887-38f2-4037-9dc8-af914068acc7/72305129252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73d558be-9bde-412c-af6c-d1e20ed00034/amazon_prime_video_subscription_cancel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dfdc68a-d136-4343-a39c-af9b94c10619/samsung_ue50tu8507uxxu_50_smart_4k_ultra_hd_hdr_led_tv.pdfIn PDF document text
    • http://wutesejib.onlinewebshop.net/varicocele_grado_1_tratamiento.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_off0000ef6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6C 5112 bytes
SHA-256: f72c97cbde541dc4d976b2dcf93e4047deb481d138199e69bbaae6b2ea43d0eb
font_01_sfnt_off000100e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E7 10696 bytes
SHA-256: 61be1e9a1856cf1480b4eb89d62b2ea4ceaff4d5a3d387463fafd45e2d4e82d1

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