Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa60662329f7ebff…

MALICIOUS

PDF

78.9 KB Created: 2021-02-07 00:05:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f3ae31e7e6d14b0d2161ec453107fe87 SHA-1: 70be0cb481219ea4b6743a1e0b56b6dc9ec23eb1 SHA-256: fa60662329f7ebffa3ce629029704e890bd219241579987dd5314ec259e93b9a
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly suggest the document is designed to redirect users to malicious 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://seumenha.ru/123?utm_term=inverse+hyperbolic+functions+pdf PDF link annotation
    • https://fuzanageguv.weebly.com/uploads/1/3/5/3/135305388/3274279.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393511/normal_5fee2c2697d22.pdfIn PDF document text
    • https://xizirujikalowev.weebly.com/uploads/1/3/1/4/131454807/padovaxena.pdfIn PDF document text
    • http://tasuzafu.22web.org/88188843600.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366339/normal_60086ebb8ae27.pdfIn PDF document text
    • http://vobefoli.iblogger.org/13278135999.pdfIn PDF document text
    • https://renibopasuviwi.weebly.com/uploads/1/3/4/3/134305424/4713390.pdfIn PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/lewekexi_zexufafo_fuduk_xuwadakanu.pdfIn PDF document text
    • http://dirugalaw.22web.org/77863176715.pdfIn PDF document text
    • https://zabagazepag.weebly.com/uploads/1/3/4/4/134498959/ccca899c3669b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376379/normal_5fca9155bedc3.pdfIn PDF document text
    • http://wazumitizun.22web.org/83905126245.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390095/normal_5fdd351d4d5d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_6019b932ace2f.pdfIn PDF document text
    • http://gokuluzed.iblogger.org/1_week_calendar_template_excel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465690/normal_600c43928be0e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nujidurib.rf.gd/fuvogoruluzakuwoserij.pdfIn PDF document text
    • http://giduzorim.epizy.com/jokaromikevajegavi.pdfIn PDF document text
    • http://tituroxir.rf.gd/pudewevawudu.pdfIn PDF document text
    • http://nazifaba.rf.gd/dofasonaroge.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB3 5272 bytes
SHA-256: bb510f6ce0e9fa1d046a8d7aa87f85f7a905b5eb194a3c65e52eb0090ecfa5cc
font_01_sfnt_off0000eea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA8 11932 bytes
SHA-256: 1b9be56527bac5ef75373480e1d86fc3d76e7026880d3a05326cad5cd3f11d8c
font_02_sfnt_off000117cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CD 16420 bytes
SHA-256: 17ea955d958ce410e9367ba223cf8155db77a67fbb71277ac303cb7491595efd

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