Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb7e61ebd03e4e73…

MALICIOUS

PDF

79.7 KB Created: 2021-04-07 19:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5fadcda35fdc29401e74f9946dc2f511 SHA-1: 4b5068cda4f9ad6c68844aa6536a19a07798c638 SHA-256: cb7e61ebd03e4e73686f758179ee333ed8061dc9ab0e19f98ad1777af8feb879
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to direct users to potentially malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links suggest a tactic to drive traffic to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • 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://xajibur.ru/strik?utm_term=how+to+calculate+income+per+capita PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379839/normal_601c6531b15d4.pdfIn PDF document text
    • https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/c3bae4a.pdfIn PDF document text
    • https://cdn.sqhk.co/bevurokakug/jdgjjgc/lucky_lanes_bowling_alley.pdfIn PDF document text
    • https://nuvawusop.weebly.com/uploads/1/3/5/3/135302159/bemegema_xosiv_kogowako.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421058/normal_5fd0821f9de4a.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/fz6W9wq/smash_ball_brick.pdfIn PDF document text
    • https://kuxodebareku.weebly.com/uploads/1/3/4/0/134042390/tuwojejujogumuxolup.pdfIn PDF document text
    • https://cdn.sqhk.co/xugufufifo/ACgi33K/square_brochure_mockup_free_psd.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/lugaxokaveb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450632/normal_60544a7144a21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480389/normal_6039f03b6e684.pdfIn PDF document text
    • https://wixalotoduf.weebly.com/uploads/1/3/5/3/135305273/e32244.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/0f5c4b3e-a293-4598-a8f3-fb51f7a90b28/maytag_stackable_washer_dryer_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/chess_tactics_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/aquatic_animals_video.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/81187450330.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/watch_the_unbearable_lightness_of_being_online_free_123movies.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/wowepuwexibake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d14e3e5a-df2d-4b3b-a5e6-1d119c7a6e1f/chrome_flash_extension.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/crossword_answer_for_all_without_exception.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/sales_report_headlightmag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3cbc987-7516-47cc-a24b-a4b95c9d722f/acorde_de_bm_en_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/39025641056.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_off0000f8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F7 4952 bytes
SHA-256: 0b4ff7c316bd6472f10d4d2c836dd827eb370de4077f3c3e8c80aaa4f2246dfe
font_01_sfnt_off000109c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C9 11676 bytes
SHA-256: 55d4448c1f38f705a21d708077f327eefa7c8169a3a12a1455372422d944df2a

Open this report in the interactive analyzer, or submit your own file for analysis.