Malicious PDF — malware analysis report

Static analysis result for SHA-256 b674f247fc817332…

MALICIOUS

PDF

88.9 KB Created: 2021-09-13 08:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8893d166cf86a0ce115891b1cdcecf3f SHA-1: 3c98827284bf877c0b727a354918456ea1699d52 SHA-256: b674f247fc817332a294d973634c2184fe4b64b6fa6ff9573f97865d3ac0e227
156 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malware distribution lure. It contains a link farm pointing to multiple domains, with one URL identified as being hosted on compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure and embedded links suggest it is designed to trick users into visiting external sites, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xn--djr00fsyfv0o5qgy9u.net/filespath/files/20210910225521.pdf
    • http://elencostruzioni.it/userfiles/files/pebetitevitaxok.pdf
    • http://nieruchomosciklodzko.pl/files/file/jefinuwirasoj.pdf
    • http://adasbruiloften.nl/userfiles/file/zubibanepisofi.pdf
    • https://sdudyogtechnologies.in/ckfinder/userfiles/files/12547361033.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613301a731127---91759778369.pdf
    • http://nsmpublicschool.org/slbdavbatala/userfiles/file/4703525488.pdf
    • http://steelfurniturecn.com/d/files/32755026303.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa7458fc36---39250354890.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138b81a11e63---zotivasajoxa.pdf
    • http://goforthegreengolfpools.com/userfiles/file/81710384273.pdf
    • http://www.egavilanes.com/ckfinder/userfiles/files/60490702453.pdf
    • http://bulk-supplies.com/userfiles/file/65912656976.pdf
    • http://elesi.eu/fichiers/files/xufuxizovemupasevolor.pdf
    • http://ukwoodrecycling.com/userfiles/files/wedewiv.pdf
    • http://www.painters-restaurant.com/userfiles/file/wedemaxuxebuxozazi.pdf
    • http://oletrans.sk/editor_uploads/files/65634071014.pdf
    • http://grupophi.es/uploads/files/42524882738.pdf
    • http://erex.hu/upload/file/36218149503.pdf
    • http://cmorshomecareassociates.org/uploaded_files/userfiles/files/ritudufopubiradudesumaf.pdf
    • http://bretagne.annuaire-regional.com/ckfinder/userfiles/files/33713740838.pdf
    • http://beerskiboot.com/img/upload/file/16152928597.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+watch+bhool+bhulaiyaa+full+movie
    • 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_off0000f7e0.bin
75a9d5691343de4124696702fe4218858ff45d5fbb9f00220bbea2980bef46b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E0 10728 bytes
font_01_sfnt_off00011092.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11092 16792 bytes
font_02_sfnt_off000128a4.bin
00b4ef71ee11dbdca2e8337d1e573261634644800af5e826d9f84769606d5f40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128A4 17596 bytes

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