Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e992799a43d1e0e…

MALICIOUS

PDF

82.0 KB Created: 2021-09-10 14:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 086c1d66497faa55445ee1edbd88a545 SHA-1: 4c41cf23c8204c2f0057145c54b4dc9ff17f7b5e SHA-256: 0e992799a43d1e0e11b7b6e988ceacb1a75f366f0a825bdeda503692db6191bc
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. The document contains numerous links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a phishing attempt, likely leveraging social engineering to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://misterholidaysanprisco.it/userfiles/files/fisozijifati.pdf
    • http://infiniti.e-library.tw/uploads/files/zavojogotukodakawebaf.pdf
    • http://lignumweb.com/site/webroot/uploads/files/11406475461.pdf
    • https://mamap.in/ci/userfiles/files/20007626288.pdf
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/gijelararafonigifo.pdf
    • https://5udua.com/contents/files/13583913350.pdf
    • http://www.horakgolf.cz/ckfinder/userfiles/files/zaworemamoxeze.pdf
    • https://kolegium.inaheart.org/upload/files/33735475536.pdf
    • https://profix.fr/ckfinder/userfiles/files/gizulajemoluduni.pdf
    • http://urbanelect.com/userfiles/file/50608908887.pdf
    • https://masihpt2.com/contents/files/xowakotosogelikirebega.pdf
    • https://portalbime.com/UploadedFiles/New/file/38594057938.pdf
    • http://hoinhikhoavn.com/img/files/96439395952.pdf
    • https://seedcambodia.org/htdocs/cljr/data/files/xaloreg.pdf
    • http://smenergy.kr/uploaded/file/14421056816139834d816e5.pdf
    • https://magerp.org/upload/files/gafisixeranupoxor.pdf
    • http://filippodelvita.com/demo/userfiles/file/wanujumeregalenazis.pdf
    • https://rossbeede.com/userfiles/file/53516055668.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613923ddb245d---39810366215.pdf
    • https://wineart.online/userfiles/file/semotofifadukesukogatine.pdf
    • http://hig-hegmann.de/userfiles/file/69498446447.pdf
    • http://prasongp.com/file_media/file_image/file/62189819447.pdf
    • http://kco.su/userfiles/file/56672916946.pdf
    • http://pune-india.info/userfiles/file/2728300842.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=shuttle+music+player+apk+pro
    • 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_off0000db38.bin
63a43eacdcb3caa112c208213c441b9c30c6fe1e6ac4eef7b58dc5838dc01dfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB38 10916 bytes
font_01_sfnt_off0000f488.bin
0bd80dfffe368aa6d4cd94c699d9f4fdf696205b923eb68ef881ef0982d49d1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF488 17516 bytes
font_02_sfnt_off0001224f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1224F 16792 bytes

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