Malicious PDF — malware analysis report

Static analysis result for SHA-256 577ff1a7932ed865…

MALICIOUS

PDF

67.0 KB Created: 2020-11-23 23:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6d52f5e7627feed8ac891d68cdfd676c SHA-1: 98fb8c25b1dccafd98f0caf312e46f81b4253c63 SHA-256: 577ff1a7932ed865bade75da9836ff409f0fa8dbeae711be2f4a978b986f0b99
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs, with one critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same URL. The ML classifier and ClamAV also flagged this PDF as malicious, suggesting a phishing or trojan delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffmen.ru/strik?utm_term=langston+hughes+the+weary+blues+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388040/normal_5fa3c9f5c8df6.pdfIn PDF document text
    • https://niwurakoj.weebly.com/uploads/1/3/4/5/134588258/tolaxon-naxitime-mavetisuzadabez-zibod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443801/normal_5f9e8b808837d.pdfIn PDF document text
    • https://fokomowopijav.weebly.com/uploads/1/3/4/6/134643156/237779.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/liguwubore/world_war_z_book_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6ad27f9-64b7-49e8-8a42-5bcbef462711/xojefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2855406-8f07-4c7e-a790-35eaf8964e29/schumacher_10_amp_battery_charger_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/crystal_reports_9_tutorial_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/1800221274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5059c0e6-f94c-48eb-a26b-ab01ddbd74ed/john_frieda_jfha5_varmluftsborste_du.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/32578884954.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_off0000c758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC758 5580 bytes
SHA-256: 2cf06c866eca9471484f9e76b95ee1761bf074179eec95f0d4b4d999bdf89fe7
font_01_sfnt_off0000da66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA66 10840 bytes
SHA-256: 46682a4d02db67253a1d6ca377b8c11816505f00e7d337ca5ed7e1267e4c036a

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