Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6871900e2e70440…

MALICIOUS

PDF

66.8 KB Created: 2020-12-24 14:18:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a92d104e0ad47e6725382ff2f0d0073e SHA-1: 06e46ce1e6dfd3d7b7ec0abf89a1f1caa90c7c89 SHA-256: c6871900e2e70440db8248d8111a4ac0b059e727c7f0815dc72dd8ec69042c1d
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggraff.ru, which is disguised as information about puppies. The ML classifier and ClamAV also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URL suggest it is designed to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/123?utm_term=chorkie+puppies+for+sale+in+pa In PDF document text
    • https://cdn.sqhk.co/dekaroku/VjaomQg/17233365632.pdfIn PDF document text
    • https://cdn.sqhk.co/kegetaxob/JgcJ0gi/nazijemiwoxuderu.pdfIn PDF document text
    • https://cdn.sqhk.co/riwajamugem/icgfCgn/beat_cop_xbox_one_review.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/ae2060fd-826f-4498-a67e-43e34c58e2f5/youre_killin_me_smalls_svg.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/plantronics_voyager_legend_charge_case_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f31bb8d6-2b4d-43bc-a668-e283cbe1e44a/anarcho_communism_flag_emoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d2db13-21e1-479f-b3a0-5e007eb3c0b6/wupesi.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/80981707066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc5b046-2d26-4059-92b2-f833074dd80e/wosatorafuzubopigoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/gibanujarufijabebepiliri.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/thermochemical_equations_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_off0000c8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C4 4956 bytes
SHA-256: acb06dfa1d4a73941bbab8ee2eec57a5df25b601813e1a4878024f423ee99b98
font_01_sfnt_off0000d993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD993 10956 bytes
SHA-256: 7518fd95f946959915afcd9a7b4f37aab7c3a8206944e67c5eae8e7c7f8d276f