Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbbd2e2d100fc1fb…

MALICIOUS

PDF

66.7 KB Created: 2020-11-18 10:58:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ef0c94f442d4fb30474afe87bb9b753d SHA-1: 999e30bccc9c260eb6d19040acfb8cd4e855ae10 SHA-256: fbbd2e2d100fc1fb6f43197d198225d61a5a9e347f188e521b056314c9984371
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one prominent link pointing to a suspicious domain ('trafficel.ru') that is likely part of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, suggests a lure related to a game ('Five nights at pinkie's 4'), which is a common tactic for phishing or malware distribution.

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://trafficel.ru/123?utm_term=five+nights+at+pinkie%2527s+4 PDF link annotation
    • https://desemezek.weebly.com/uploads/1/3/4/4/134458593/12dc7498d3e.pdfIn PDF document text
    • https://durabaseduxoj.weebly.com/uploads/1/3/4/2/134235759/rimer.pdfIn PDF document text
    • https://kebezade.weebly.com/uploads/1/3/4/4/134479439/6424671.pdfIn PDF document text
    • https://wizaxonaguwaxi.weebly.com/uploads/1/3/4/3/134306690/f15acc20ae.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/e03e5e88-d367-46a0-a9f8-062cd368da30/zodutub.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/company_culture_survey_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/komed.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/mejewoxizebimilejoxopo.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/anime_cloud_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/fojewazefitegosela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e0eef4-fc9d-4029-be9a-eddb800b201a/68458472052.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/waves_unit_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/unblocked_games_potty_racers_5.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/blackrock_caverns_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/all_i_want_for_christmas_is_you_piano_score.pdfIn PDF document text
    • http://gamejolt.com/games/strategy-sim/five-nights-at-pinkie-s/53804/AlleIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB314 5152 bytes
SHA-256: 8b52c6ed2ddfe77544619f0ed2a86acda4c58f26e38f1e9cf8f6ae0e0421e318
font_01_sfnt_off0000c4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BC 10624 bytes
SHA-256: e1f01d790d20549ac031c32af6d95e51e963fa42cab38547492c69df296dedfd
font_02_sfnt_off0000e88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88A 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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