Malicious PDF — malware analysis report

Static analysis result for SHA-256 be6fc8a9ba9aa186…

MALICIOUS

PDF

61.5 KB Created: 2020-12-16 01:40:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 64d86007a97db552a8a28fd2b2dd945a SHA-1: 9f51c11064acffc1eb67520eb24235709e94eb8c SHA-256: be6fc8a9ba9aa186b04c39c68315d99238c0a7f97ad59063a56b2093353c2857
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link disguised as free video content, which redirects to the malicious URL https://cctraff.ru/aws?utm_term=vaaste+song+video+status+free. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://cctraff.ru/aws?utm_term=vaaste+song+video+status+free In PDF document text
    • https://numetoximo.weebly.com/uploads/1/3/4/7/134717633/gasebi.pdfIn PDF document text
    • https://zokatitolef.weebly.com/uploads/1/3/4/7/134702636/a694107c.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/pexodugosa/amazing_saturday_sub_indo_drakorindo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a2871a-3c1c-412b-8dbf-53b13a7315aa/ruben_dario_margarita.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/air_conditioning_maintenance_procedures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2688eeb9-1a12-474d-af90-eeaa45c7543d/94588841753.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/36649164424.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/free_english_learning_audio_books.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/45897596075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce48e63-e206-4c97-a8c6-d9ce2ebc3382/geninebidarodatipu.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/saddleback_valley_christian_school_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8417029c-6347-4c5a-a313-68ec7eaf8aa3/38153058267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b674d540-6c5d-4202-89d6-98fdff336612/fetepaniw.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_off0000b548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB548 5068 bytes
SHA-256: d9c4246d28c70d771055e84432c6ee4d3d75f260899569f57e448935f7309d31
font_01_sfnt_off0000c69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC69F 10132 bytes
SHA-256: 0176391c900c54e6f81bd4c7ffc5e62d7447acffd61cfe74eb69ef09737cd087