Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e1ab888de0737e…

MALICIOUS

PDF

79.2 KB Created: 2021-01-02 09:01:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 818b4cee43541eb415509b4c67a4fc0e SHA-1: 799ff419954105b6f154b05773e314809d3e6ee9 SHA-256: 27e1ab888de0737ea4788b7e09892aa9d5251ee22d1d735584c549b7ffe8f51e
156 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or link-farming attack, as indicated by the high number of embedded external links, many of which point to potentially malicious domains. The ML classifier and ClamAV detection strongly suggest malicious intent. While no explicit scripts were extracted, the PDF structure itself is weaponized to redirect users to external resources, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://trafficel.ru/123?utm_term=i+am+in+receipt+of+your+email+in+spanish PDF link annotation
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/94bd59e.pdfIn PDF document text
    • https://komulobuzol.weebly.com/uploads/1/3/4/6/134618259/sobimuvido.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/885b97041590.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/6978290.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/vatakefojunib/solving_quadratic_equations_by_factorising_worksheet_tes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8486cb8d-157c-42ca-890e-bfbd947cd208/lumonejaxamozidonuwosafe.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/african_queen_names_list.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/mezojorulogegesututeko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7407087c-b5cf-4bc7-a06a-d015cfa33283/network_security_key_on_router_spectrum.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/79319989319.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/gudufeboselew.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/agriculture_tools_information_in_marathi_language.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/56081478954.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/barakhadi_in_english_to_hindi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/90611524876.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_off0000f85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85B 5296 bytes
SHA-256: 0f3413bf791885af2cd9b2671b7de1276bffbbec9710c24bffada316f86379f0
font_01_sfnt_off00010a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3E 11336 bytes
SHA-256: 9ad5fc5850a6359c63263dee5126c1b79eaa5421c6061e150117cea512ce2d64

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