Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9583b2dd2bdea7…

MALICIOUS

PDF

97.5 KB Created: 2022-05-24 15:39:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 162e5029f8abc8e80b07948e59fb9580 SHA-1: 96a08dda350189848ad4cd567ce65b97f39ba4b2 SHA-256: fa9583b2dd2bdea7f0f0c95bc39b235dc5518f8563fa2b26587a874374d875d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, indicative of a link farm designed to manipulate search engine results or redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these external URLs. The document body is heavily obfuscated and does not provide direct clues to the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lazav.co.za/YmrXLWy8?keyword=aprender%20japones%20pdf%20online%20gratis%20en%20linea%20gratis
    • https://wozedekasejop.weebly.com/uploads/1/3/4/7/134703393/80af25150d8.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16284355d1b2ad---50868874364.pdf
    • https://casapenela.cgb.pt/admin/files/files/negal.pdf
    • https://mibugekokedepi.weebly.com/uploads/1/3/2/6/132682655/sakubuxa.pdf
    • https://wazajodowefode.weebly.com/uploads/1/3/4/0/134017502/1544623.pdf
    • https://mvfht.ca/kcfinder/upload/files/worotavebixun.pdf
    • https://bifomika.weebly.com/uploads/1/3/1/8/131856700/4094560.pdf
    • https://pomaxobizo.weebly.com/uploads/1/3/1/1/131163853/nelatedatenun.pdf
    • https://wasael.com/userfiles/file/laniretomuvigabo.pdf
    • https://xibuderopugef.weebly.com/uploads/1/3/4/0/134042602/zudobir.pdf
    • https://sakevixumodu.weebly.com/uploads/1/4/1/4/141411211/tujuxoz.pdf
    • https://artgalery.ro/files/file/gimafamebusewalubefo.pdf
    • http://www.lesboutiquesquercitaines.com/kcfinder/upload/files/96035757211.pdf
    • https://bokojisegozesu.weebly.com/uploads/1/3/4/4/134479890/b1ac629c6e65.pdf
    • https://gijesilikisuzid.weebly.com/uploads/1/3/2/6/132683000/5047898.pdf
    • https://jeketivogusu.weebly.com/uploads/1/3/1/3/131398097/0219dbc69b1.pdf
    • https://dudumopovidin.weebly.com/uploads/1/3/4/3/134308156/377eb9.pdf
    • https://guzezetuxavipub.weebly.com/uploads/1/3/4/7/134765233/3bfd8d90c.pdf
    • https://sofugiri.weebly.com/uploads/1/3/4/5/134509821/145a94f2cf7.pdf
    • https://ziwagunu.weebly.com/uploads/1/3/4/8/134883986/aa85ac316.pdf
    • https://amrapalispot.com/userfiles/file/fotafovavakota.pdf
    • https://ralikinu.weebly.com/uploads/1/3/4/8/134883141/1b9b2bf6380ce9.pdf
    • http://mijn-nederland.nl/userfiles/file/sulufewezaditekipoxu.pdf
    • http://cityyeast.com/userfiles/file/46132942201.pdf
    • http://decaldankinh.net/upload/files/29563464514.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011496.bin
4e52a97f8e7d0727e9a9113b1332d8660ffb84466301c2fdf4a6fcbcf6c1858b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11496 19036 bytes
font_01_sfnt_off00014561.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14561 16792 bytes
font_02_sfnt_off00015d78.bin
8f9ab53a8bdd579aa55f02276a53d44b9f517acf4a693939e6dc6837521b574b
pdf-font-stream PDF embedded font (sfnt) at offset 0x15D78 10784 bytes