Malicious PDF — malware analysis report

Static analysis result for SHA-256 daae3d0c1cde28fc…

MALICIOUS

PDF

80.7 KB Created: 2021-02-21 12:04:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: a76cea6d00ebd6b633beb8804682074b SHA-1: 74d859236e42703c87bdf080f97a26ee5e6deee4 SHA-256: daae3d0c1cde28fc1cbaceaa926123ef8bf995e29546be17dbb537a2bf68eb11
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. One of these links, 'https://jottigo.ru/strik?utm_term=garmin+nuvi+2689lmt+north+america', is directly embedded. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution through these linked resources. No scripts were extracted, but the structure points to a link farm attack.

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 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://jottigo.ru/strik?utm_term=garmin+nuvi+2689lmt+north+america PDF link annotation
    • https://vekadewozume.weebly.com/uploads/1/3/0/9/130969331/5367306.pdfIn PDF document text
    • http://tvoeobrazovanie.fun/10456696326ea7pj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_600dc0967cd18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468553/normal_6030692589383.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452381/normal_5fcad24e38a33.pdfIn PDF document text
    • https://rorefodelubo.weebly.com/uploads/1/3/1/4/131452934/fifozib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421366/normal_6002b354cec76.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5fcd075d84bfd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446283/normal_5ffcc32c4ddca.pdfIn PDF document text
    • http://mon-cmb.best/piropoloporaq1qug.pdfIn PDF document text
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/3730533.pdfIn PDF document text
    • http://flowerport.store/passport_club_study_mapvy6gj.pdfIn PDF document text
    • http://wefabawatewe.22web.org/super_lemon_haze_auto_grow_report.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/marimejerebo/2006_honda_civic_lx_coupe_for_sale.pdfIn PDF document text
    • http://vobewegogiz.rf.gd/celine_dion_music_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/xamiriw.pdfIn PDF document text
    • http://wajiletum.epizy.com/mirixodaviwo.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/datepicker_format_yyyy-_mm-_dd.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/a_guide_to_it_technical_support_10th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/wonadujef.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_off0000fa2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2B 5588 bytes
SHA-256: d3a2dadca4969eba6da5e677dc15539040c2cb7465c17019113ee1d175ca90dd
font_01_sfnt_off00010d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D05 11420 bytes
SHA-256: 4a261137bfe17bb02371f48c2a95856a7f134965b4d6bb644c6e06ac65b66f4a

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