Malicious PDF — malware analysis report

Static analysis result for SHA-256 89bdff514ccbd7cd…

MALICIOUS

PDF

63.5 KB Created: 2020-11-23 06:09:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e84e3690cebff2541cb19a3be8b7086a SHA-1: 8603ff0c9f0d240869891575b1251450ae77d251 SHA-256: 89bdff514ccbd7cddda1cd19ba5892a294e4f64bb96b2b6e74e57876e731da9d
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of an external URI pointing to 'traffnew.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and associated URLs indicate it is likely used as a lure 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://traffnew.ru/123?utm_term=fort+indiantown+gap+cemetery+map PDF link annotation
    • https://paseboke.weebly.com/uploads/1/3/4/4/134432883/mavomufigim.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kadupe_ripovu_jozovagazemewe.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/fatupuzape.pdfIn PDF document text
    • https://xetibipu.weebly.com/uploads/1/3/4/5/134528590/4915565.pdfIn PDF document text
    • https://xuduburuk.weebly.com/uploads/1/3/4/3/134323667/kovoropo.pdfIn PDF document text
    • https://vokudaminovisuz.weebly.com/uploads/1/3/4/4/134495340/5618201.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/lijopavexanuse/18052953554.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/fotatazubijosovesijajosiv.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/lonorufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0bd3a83-43c5-4e56-ad70-f371767e93aa/lapakatezutepemigezotoki.pdfIn PDF document text
    • https://s3.amazonaws.com/mazugezijap/dukakizaloga.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/learning_technologies_group_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rimadefule/how_old_is_sharon_stone_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d04c03-2caa-42fe-8298-b639fe3ee508/antm_9_wiki.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_off0000bbfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBFA 5332 bytes
SHA-256: a28db35b3b924458934beb2b632f2f87b1737efc37f4bb7d65349068920345b8
font_01_sfnt_off0000ce28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE28 10316 bytes
SHA-256: 33db6350e01c57238f6380347445de1fc75d451965effe90d902678ba3700bc6

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