Malicious PDF — malware analysis report

Static analysis result for SHA-256 e549d0e05c3e2c95…

MALICIOUS

PDF

65.7 KB Created: 2021-02-16 00:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8da6041002b2914026e137565fc85bd6 SHA-1: bc8015165807fa48f81035c3e8833b5acf55ed7b SHA-256: e549d0e05c3e2c95779d068c02b0a09b73df799682e4975db7672b28f72fca31
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, including one to 'jottigo.ru' and another to a Weebly-hosted PDF, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded links point towards a social engineering 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+vivofit+4+manual+dansk PDF link annotation
    • https://sunajojafexa.weebly.com/uploads/1/3/1/8/131856627/zisupibotisiwe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489587/normal_5fe48150c1d25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452609/normal_6003266786f95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401971/normal_5ff54d620a5db.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/sewamos/mibobapixitegonisuj.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/56470086633.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/jitogexoloxojijozaxevima.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/xufanafonirafovokaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/my_google_adsense_account_information.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/dufoxakumi.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/kutinimezinufenuk.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/angry_birds_seasons_mod_apk_rexdl.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/regodisojimimerirazunisug.pdfIn PDF document text
    • http://jawikaginixuxuz.rf.gd/50288102323.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/75003805892.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/vipid.pdfIn PDF document text
    • http://riluromeni.epizy.com/vunel.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/wawuwarerelakip.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_off0000c5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AC 5296 bytes
SHA-256: 08a73e6fef2d06eabbffc821e553663c3b754c209e583e2cf449e4ae93097f40
font_01_sfnt_off0000d7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A8 9952 bytes
SHA-256: 28785bd5a0f8796fa4997438f2723166d174ea3103fe878eff7bf7dfef21b0b7

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