Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe51f7cae92053fa…

MALICIOUS

PDF

84.7 KB Created: 2021-02-12 09:05:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5849bdb293173a085baa0f2842541e26 SHA-1: fe7c68790bc55b1c29a1cc5f03e0f9c4ff5326e5 SHA-256: fe51f7cae92053fa13943b8814265d42457167196ee498fe017c0d0fb1fb6a42
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, characteristic of a link farm, with one prominent URL being https://baarspo.ru/123. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of numerous external links indicates an attempt to redirect the user to potentially malicious sites.

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://baarspo.ru/123?utm_term=pathfinder+pinpoint+targeting PDF link annotation
    • https://cdn.sqhk.co/jukelifawap/gfpgfLE/4476621709.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/fE1eSSK/bowl._com_league_averages.pdfIn PDF document text
    • https://woxarupuxanuma.weebly.com/uploads/1/3/1/3/131383908/muzab-komirawebenotes-dojunog-rubetavubamek.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/3hdOjjp/94702444157.pdfIn PDF document text
    • https://kemovovem.weebly.com/uploads/1/3/1/4/131408999/nedesodex-kuxim-vifawodajabimuk.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/ihjz8hc/fall_season_starts_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zatufora/jeehhaz/black_friday_2020_apple_watch_canada.pdfIn PDF document text
    • https://mujolimu.weebly.com/uploads/1/3/4/8/134868529/0fa4c.pdfIn PDF document text
    • https://zexakadobad.weebly.com/uploads/1/3/2/6/132682290/3011043.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jawoguvanonamud.epizy.com/marines_hymn_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/53994499704.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/thesis_writing_style_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/saluditiziwerutexoxel.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/chm_103.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/equivalent_resistance_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/scooter_software_beyond_compare_free.pdfIn PDF document text
    • http://juzatapanosuwi.rf.gd/bertec_treadmill_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/brazil_flag_gif.pdfIn PDF document text
    • http://tuxefefili.epizy.com/wimatuboluralasawenabowe.pdfIn PDF document text
    • http://pelatid.epizy.com/kawiken.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD9 4880 bytes
SHA-256: 35db981f87522e735c0d2a92ac424f278e78a7fe9cebf8d88ee23f91634aa5c9
font_01_sfnt_off00010e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5A 12272 bytes
SHA-256: f0c65c0112419f04a6e74591b7386b08e2822fd9a42e5fe92f429892bda9eede
font_02_sfnt_off0001353e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1353E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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