Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca7c64e9057f79ff…

MALICIOUS

PDF

81.9 KB Created: 2020-12-25 02:31:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f223c53ee5fa92e5faf425b7b8bf0d42 SHA-1: d786a6fd880a0863801667fbaa5e26bb397670c9 SHA-256: ca7c64e9057f79ffe437ade0cb1a4cc7b2075ddf979dc53bb7b66792f887574b
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many pointing to potentially malicious domains, suggesting a link farm or redirection scheme. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to drive traffic to external sites, likely for malware distribution or phishing. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/123?utm_term=black+figure+pottery+geometric
    • https://laropavo.weebly.com/uploads/1/3/4/5/134585926/5727712.pdf
    • https://cdn.sqhk.co/jozojijejip/zieijI1/28182041637.pdf
    • https://cdn.sqhk.co/marixefe/uhaiiQl/best_free_repost_app_for_instagram_2020.pdf
    • https://misopiwulasi.weebly.com/uploads/1/3/1/8/131856666/jipedebol.pdf
    • https://fozikubovofow.weebly.com/uploads/1/3/4/8/134897471/xaxinodujibizer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/b57db6ed-ec3e-40cd-9455-f75a0556e8ea/milhouse_van_houten_personality.pdf
    • https://uploads.strikinglycdn.com/files/4ac1114d-3f57-478f-bfe5-2a01da0fb502/sejuxekonuvu.pdf
    • https://uploads.strikinglycdn.com/files/e021f423-741e-433a-94a9-e6586fab2dec/cartoon_wars_gunner.pdf
    • https://uploads.strikinglycdn.com/files/5a8c286f-129d-4def-91cf-0bbc1790eaed/95737992994.pdf
    • https://uploads.strikinglycdn.com/files/cecca4b9-d844-4133-8aa8-0729cce6b689/95149032300.pdf
    • https://uploads.strikinglycdn.com/files/a4e299cb-6f9e-4f28-b886-13346cf29221/57923834016.pdf
    • https://uploads.strikinglycdn.com/files/53baece7-8dd6-423d-b167-6b4bdc5b5775/83020896750.pdf
    • https://uploads.strikinglycdn.com/files/66a90b21-363b-4ee7-a66e-b6a5828a58ec/ability_capsule_insurgence.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f70a.bin
08ecabc86f00bf6930ae66cfb8f5083cd6cddaff4e5182298488826e7f24aa44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF70A 5148 bytes
font_01_sfnt_off000108a7.bin
09801635df1cecd3968915a5a525359613e41fa432d31b1ccaeeb50376a17ae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108A7 10792 bytes
font_02_sfnt_off00012d0c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0C 4324 bytes

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