Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0dd106dc9714dd…

MALICIOUS

PDF

77.6 KB Created: 2021-02-22 01:59:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ec7709787799518d33a4f6c75a79c1e7 SHA-1: 831a375f95efd95e514e6c7b824556e8e8eb5b2a SHA-256: 6c0dd106dc9714ddf3f6299eaf3cffe309f1088a4d9090e0e08ad51e1ca838af
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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/123?utm_term=cliff+swallows+and+barn+swallows PDF link annotation
    • http://wofeboz.66ghz.com/grandstream_ucm6208_admin_guide.pdfIn PDF document text
    • https://sozivaxuzafuzi.weebly.com/uploads/1/3/1/8/131856435/xupudezedolal_dudoxir_nanedoseseme_mitujutu.pdfIn PDF document text
    • https://vemubofopelo.weebly.com/uploads/1/3/0/7/130776521/89cf4.pdfIn PDF document text
    • http://options.expert/tawugomojidinclxg.pdfIn PDF document text
    • http://universal-kirov.ru/lewubugixedetodatiujsqd.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/jeujegh/22762631975.pdfIn PDF document text
    • https://zajefogana.weebly.com/uploads/1/3/1/4/131407312/mufedokafat-xolubera-dutujasem-bapaxeferedomuf.pdfIn PDF document text
    • https://jupuwova.weebly.com/uploads/1/3/1/4/131409597/5913f.pdfIn PDF document text
    • https://xonutupusuvulin.weebly.com/uploads/1/3/1/8/131871786/punajobivekijibeto.pdfIn PDF document text
    • http://civiliscmq.online/el_exorcistau9xwq.pdfIn PDF document text
    • https://palukenibimel.weebly.com/uploads/1/3/4/4/134401756/gogisegifakapi.pdfIn PDF document text
    • http://tovelksa.website/14323138612uotdy.pdfIn PDF document text
    • https://dikasawo.weebly.com/uploads/1/3/5/3/135349802/2225608.pdfIn PDF document text
    • http://zavodtriumf.com/kenmore_washer_not_draining_completelyi6e7c.pdfIn PDF document text
    • http://makukenumeg.22web.org/joomla_templates_free_full_version.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxaletadi/jchhJmu/durevinepusefitesoleb.pdfIn PDF document text
    • http://austritkfa.com/sims_3_vs_sims_4_graphics_requirementsy2gev.pdfIn PDF document text
    • http://vumavotanumibuv.iblogger.org/rusemakurodikux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magajavopisili.epizy.com/96123441046.pdfIn PDF document text
    • http://wekaniloba.rf.gd/rajasthan_handloom_bedsheets.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_off0000f49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49F 5036 bytes
SHA-256: c78d383e912ba07cfa5b1368a0a1ac210b738e7cd103900d3241c5d949b7dfa1
font_01_sfnt_off000105db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DB 10224 bytes
SHA-256: 91a3f2351a45d777f088f354a687891a8d6e7fbcd5aac532bd92dc630b08731c

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