Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf6227f6cc51046…

MALICIOUS

PDF

71.6 KB Created: 2020-12-25 16:25:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: dd3da51a2783521f131f949fec9c5078 SHA-1: 6f70068c1559b3c65e4ff7722ff52bf493bcbf84 SHA-256: faf6227f6cc510460b3bae5562fa194e0c806ec8ab6d6eaeace9b20303a61c24
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external resources, with one specifically identified as a malicious redirector. The heuristic firings indicate the PDF is designed to link to a large number of external PDFs, likely for SEO manipulation or to host malicious content. ClamAV detection and ML classification confirm its malicious nature, suggesting it's a phishing or malware distribution document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=ice+machine+not+making+ice+samsung In PDF document text
    • https://cdn.sqhk.co/masamiwe/aDrgi2P/spaceflight_simulator_download_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5f8ca7e992c66.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/egjgghj/rally_s_locations_in_michigan.pdfIn PDF document text
    • https://moxiwomalupul.weebly.com/uploads/1/3/4/5/134598527/wexerorefuzepa_remevudonapade_tapem.pdfIn PDF document text
    • https://lanoxujuzon.weebly.com/uploads/1/3/4/6/134630121/poxetimidibo.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/memul/black_panther_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/movie_download_free_app_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62255657-f592-4eea-8036-d40f11d1100a/subudupixutevepewaremifup.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/political_candidate_profile.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/25172288934.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/vevoxikofali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/011339a0-ab01-4d0a-9434-90b62e9e9cf3/all_scholarships_available_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/908f4aed-173f-475e-9207-448a6896cdd4/army_weight_calculator.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_off0000db62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB62 5084 bytes
SHA-256: 9d3a649a9cd85248ae1dec5a614274398894b38327159e3cf6050fdb7a892de5
font_01_sfnt_off0000ec8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8A 10848 bytes
SHA-256: 2236a0d814dec49090035b95ecdd9e282189f17dc7e9eff3bf306fe6e3661456

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