Malicious PDF — malware analysis report

Static analysis result for SHA-256 f060ba779a859ebc…

MALICIOUS

PDF

85.0 KB Created: 2021-03-05 02:24:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ce13ff5fae6caa2dee1b5254b1ac246d SHA-1: 42c81349278b3a38a6060e8263735f77ed94258a SHA-256: f060ba779a859ebc84e104b5efae8dcd2ab4468dfae09c638370d3e711bcf9c2
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The primary URL, 'https://baarspo.ru/award?keyword=how+do+i+reset+my+netgear+nighthawk+router+to+factory+settings', indicates a lure related to router settings, likely a phishing pretext. ClamAV and ML classifiers strongly indicate maliciousness, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/award?keyword=how+do+i+reset+my+netgear+nighthawk+router+to+factory+settings PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460251/normal_5fcd51bbacc94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490380/normal_6013dbbdd0532.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481520/normal_5ff121acc5982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420025/normal_601b48dae74d7.pdfIn PDF document text
    • https://cdn.sqhk.co/zujumatatub/hjhOidX/3d_soccer_ball_drawing.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/qiehcft/sixaxibebu.pdfIn PDF document text
    • https://cdn.sqhk.co/tokititagiwe/a39elgd/resazev.pdfIn PDF document text
    • https://wapapoda.weebly.com/uploads/1/3/4/5/134581042/65528c17d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503524/normal_60053f19808b8.pdfIn PDF document text
    • https://wozexofinudere.weebly.com/uploads/1/3/5/9/135984457/2fd8df31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371536/normal_600e213710e2e.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/jWxLhdW/wumovubopepozup.pdfIn PDF document text
    • https://raxorevowipafe.weebly.com/uploads/1/3/4/7/134765671/7593809.pdfIn PDF document text
    • https://fogurasetaj.weebly.com/uploads/1/3/5/9/135961985/xudug.pdfIn PDF document text
    • https://cdn.sqhk.co/bevoroxur/TT7igjc/n64_emulator_download_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393508/normal_5fd0a6cab06c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450417/normal_6035196a5b73b.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/601c37fc-b410-4246-b8c6-1b76e713e7eb/nerusunizupuvurokixured.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3057264-6366-4eeb-bd8b-9873b1740083/how_to_treat_pimple_spots_on_face.pdfIn PDF document text
    • https://0e627107-309b-4451-a84d-e7064c41fccd.filesusr.com/ugd/04c368_8ec2f794ec7b431da12d07ce3288c842.pdf?index=trueIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_df7203af00bc4687af44b119eedd3c72.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/924d99eb-c6e2-4431-ad21-25ac7976c867/dasiralevafosepumomemid.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_off00010f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F39 5624 bytes
SHA-256: 17f3e65696a6d18fa7cfb37926926ed9aeccbd5279050500e91fd10c2c431cda
font_01_sfnt_off00012243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12243 10352 bytes
SHA-256: e06a3e6aefdddb5f82b7967d1cd1c90eb65cb2629a9a25c032e79ef06bfefe2c