Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c608ed5163b5fd1…

MALICIOUS

PDF

103.4 KB Created: 2022-06-01 06:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 777d754048773cc0577260f8ff6f9900 SHA-1: 2ec97ba713c3078e6518cf0fdd289a1519da653f SHA-256: 9c608ed5163b5fd1bc1a1120ae72866894253298a4c348cdad676d0f3308d31a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of external links, indicating a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing or malware-hosting sites. The presence of multiple Weebly-hosted benign PDFs alongside the malicious ones suggests a common hosting pattern for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cafij.co.za/YmrXLWy8?keyword=startup%20owner
    • https://regogugone.weebly.com/uploads/1/3/4/8/134891767/venono.pdf
    • http://spostojow.pl/userfiles/file/15622601253.pdf
    • https://eniedu.com/data/file/20220413021007.pdf
    • http://hoteldanang.vn/uploads/images/files/48290756095.pdf
    • https://tejegedalozo.weebly.com/uploads/1/3/4/8/134870252/dca392aa27383.pdf
    • https://xagubeko.weebly.com/uploads/1/4/1/2/141287659/vapozej-terizixi-vufuvalumedenal-buxujakepi.pdf
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/31e712e9bdc9.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/162438631af3bc---22382487764.pdf
    • https://fapofojeriverid.weebly.com/uploads/1/4/1/7/141758376/8fe193db7.pdf
    • https://mabiredozex.weebly.com/uploads/1/3/4/4/134482212/10d2bf40e751807.pdf
    • https://tapawodi.weebly.com/uploads/1/4/1/5/141576993/142355.pdf
    • https://muluxebaxomoj.weebly.com/uploads/1/3/5/4/135401331/zulajefukokuti.pdf
    • http://dungculamdep.com/fckeditor_userfiles/file/73284965017.pdf
    • https://mebavowu.weebly.com/uploads/1/3/4/3/134353315/judik-lidemasozun-letafumu-wupatoxilimuvu.pdf
    • https://tazuromanuzowo.weebly.com/uploads/1/3/1/6/131636862/98d759b4c47ee38.pdf
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/sutug_tubabusarejivi_newaxobiwatada_nenilakad.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_off00012d17.bin
025beddc45037c5bd119cc46831c843c74d9aa0630db370e197dc4094e76c359		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D17 17724 bytes
font_01_sfnt_off00015b8a.bin
685b79a86f0e8a33f2134fc9c0ce02c0126ffac981998c1823737d0326fadcd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B8A 11272 bytes
font_02_sfnt_off000175dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x175DC 16792 bytes

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