Malicious PDF — malware analysis report

Static analysis result for SHA-256 b645feed6ca35305…

MALICIOUS

PDF

58.3 KB Created: 2020-12-24 02:57:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1776bef46f1dde57caa9d423f64e5386 SHA-1: b8179cb9fae528b172336c114cd759ef0465faa2 SHA-256: b645feed6ca3530568de0bd21d6b6007844f7afc705e61e587e3fab943ccc946
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous external links, with one prominent link pointing to 'trafftec.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to reference a game ('Bubble shooter pirate 2') as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=bubble+shooter+pirate+2 PDF link annotation
    • https://kolivobaka.weebly.com/uploads/1/3/4/5/134500933/bafejezeximaverorogi.pdfIn PDF document text
    • https://cdn.sqhk.co/dakagugi/eJhi8cK/free_printable_online_grocery_list_maker.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/ritasosew.pdfIn PDF document text
    • https://zefisuket.weebly.com/uploads/1/3/4/8/134868467/687673407760a.pdfIn PDF document text
    • https://cdn.sqhk.co/kibizatududo/idrhcps/naia_national_championship_football_game_2019.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/pusumowi/ap_psychology_princeton_review.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/wiwirosafija.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/manutubi.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/autobot_helicopter_transformers_4.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/nokia_6._1_plus_android_one_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/zoology_gk_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/28535371401.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/chloroplasts_and_mitochondria_worksheet_key.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/bajaj_bajuri_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/zotabomikir.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/gta_san_andreas_cheats_file_free_download.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
stream_002_off0000ac81.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAC81 5228 bytes
SHA-256: 989948162e9477917f2fe3ad3765373018843a224c53614cb517f12cfea17fad
font_01_sfnt_off0000be33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE33 8952 bytes
SHA-256: 9261e7828c856f2d84f82b6d086d79b7602c53ac79a9b3e66dcb6f8b03a3e4c0

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