Malicious PDF — malware analysis report

Static analysis result for SHA-256 f33eec29a9fbac47…

MALICIOUS

PDF

75.0 KB Created: 2021-02-13 22:21:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d29761d5e4a112b63a25689e8dd0ffbb SHA-1: a090f75eff15dc24bb393c04e9e553946527c20a SHA-256: f33eec29a9fbac4787d7280f17b5aeec1c96e9bf02f248f01a8a9fecb0e128db
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains or services like Weebly and sqhk.co, suggesting a link farm or SEO spam campaign. One of the embedded URLs, 'https://baarspo.ru/wix?keyword=drinkwell+avalon+pet+fountain+manual', indicates a potential lure to trick users into visiting malicious sites. Although no scripts were explicitly extracted, the PDF structure and extensive link farm are strong indicators of malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://baarspo.ru/wix?keyword=drinkwell+avalon+pet+fountain+manual PDF link annotation
    • https://gavemipaxok.weebly.com/uploads/1/3/2/6/132680822/4093290.pdfIn PDF document text
    • https://gamajebijapam.weebly.com/uploads/1/3/1/8/131856653/6c100e.pdfIn PDF document text
    • http://legendnat.space/bojivolomixixote4zco1.pdfIn PDF document text
    • https://cdn.sqhk.co/mibaforetu/fFODkjg/jinut.pdfIn PDF document text
    • https://litepuvib.weebly.com/uploads/1/3/4/7/134741427/nonexero-nobuduj-mixaw-wunoruwusasideg.pdfIn PDF document text
    • https://vuwezamubom.weebly.com/uploads/1/3/0/8/130814902/87cf11b6d.pdfIn PDF document text
    • https://zonanasuwovu.weebly.com/uploads/1/3/2/6/132683154/9925389cb4e.pdfIn PDF document text
    • http://zanartcc.net/the_mummy_hindi_movie_downloadwwnpc.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/rxibjdW/gelufulixavesi.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/GhgYijH/59843053364.pdfIn PDF document text
    • http://monoga.space/445689998952vbdb.pdfIn PDF document text
    • https://femovoba.weebly.com/uploads/1/3/0/7/130775826/nifubidogaf.pdfIn PDF document text
    • https://cdn.sqhk.co/ledodatefu/WfiabVZ/x2_blocks_merge_puzzle_2048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499629/normal_600a61a57d94c.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/5c459ef.pdfIn PDF document text
    • https://xuwudobuxu.weebly.com/uploads/1/3/2/6/132682441/juwinez_numekogabapote_simovokemut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wefazor.epizy.com/78126939979.pdfIn PDF document text
    • http://konewumabujak.rf.gd/a_o_r_full_form.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD808 4176 bytes
SHA-256: 60c3d989808c212773969c5d681a2ae41a20cf233dc3ea96a1991a202c6b6f2a
font_01_sfnt_off0000e6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F9 5084 bytes
SHA-256: 9aa2a6ea9bfac293a87be729a092a40d36f0948f56a43136061f8b8c21dbc86a
font_02_sfnt_off0000f855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF855 11312 bytes
SHA-256: 3402b6e3d57aeb019bb2e01807c7ea2b8505cc36f50457a97427f6c590cb6b6f

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