Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b3815dae04e791c…

MALICIOUS

PDF

76.5 KB Created: 2020-12-29 18:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: dc26f7cf1bc81bcf26e9106554e04e15 SHA-1: d2b5cee9e4824f0d0a3b6bd02602a1f042c28dac SHA-256: 0b3815dae04e791c31e77dc52ae9123d74527f05fc972e0919a0899a0e5154a2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external links points to 'trafftec.ru', which is presented as a 'music player app for android'. This suggests a phishing or social engineering lure. The presence of many PDF links, including one hosted on 'strikinglycdn.com', indicates a potential attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes. No scripts were extracted, but the overall structure and linked content point to a malicious intent.

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://trafftec.ru/strik?utm_term=music+player+app+for+android PDF link annotation
    • https://vuxaxumiduwo.weebly.com/uploads/1/3/4/6/134603627/vofuditatalo-sobafobukunexix-medaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413980/normal_5fba135b92d8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489412/normal_5fb8d26525b04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420766/normal_5fc20e228fc84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388815/normal_5fdb6117cb616.pdfIn PDF document text
    • https://woninulanomawij.weebly.com/uploads/1/3/4/6/134670754/diwaruluwigodidafox.pdfIn PDF document text
    • https://tilotifibow.weebly.com/uploads/1/3/4/5/134505855/rurotozalisoj_nonovu_migugar.pdfIn PDF document text
    • https://regurawuxafedan.weebly.com/uploads/1/3/0/7/130740517/dedb496b9928f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a5d4dc7-1e12-49db-8e28-ac73fdcd1229/zavurogebatomazikogulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64b23f53-febb-4759-abee-afbf0dd39179/72171589041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7092fdfb-f717-4e86-930a-3aa9f78d82ae/kero_the_wolf_dog_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9d25869-d337-435c-af90-a4ca7f7c5d00/fejowutabekulisiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ed2ea83-4848-4372-80a8-6df7d0a64504/paruvazum.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/aslam_ali_kamaiyan_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/bayes_and_empirical_bayes_methods_for_data_analysis.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_off0000edad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAD 5256 bytes
SHA-256: c6b4e4517c20e26fff706e495fe9cc1e7641ae521916cbd6ca72ffaf483dc729
font_01_sfnt_off0000ffb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB3 10928 bytes
SHA-256: 98a79b8ce12b83b8dbb7cd696cba5086e913c9505a738462f27fc6bb08121400

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