Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce16047f90f9de7…

MALICIOUS

PDF

80.4 KB Created: 2021-06-28 02:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5259d85688a7d450fe4ac57e28181333 SHA-1: 3915e9ac7db7ec4afd6b0a472499de149b02c8af SHA-256: cce16047f90f9de79cb34c7719dc4d59d453ba4284cead3c28ebbef2c4a507ea
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure users to malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/9v5krrj4fn5f76erqkpg6a9fm7/31480453560.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5b7e75b20---bogofez.pdf
    • https://ringid.vn/ckfinder/userfiles/files/79984376297.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/3c29d9796102f90891ee7fe27f89696f/jotaviwetexivotorikateniw.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884a87d5fe4---romufidi.pdf
    • http://ahdongjiu.com/upload_fck/file/2021-5-2/20210502141633201008.pdf
    • http://renovfab-menuiserie.com/userfiles/file/46365584519.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/4ff50eja89p07s48c655gpe7o0/80195550245.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609b235e08c8d---mavejemuraxupa.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083a6ebedb21---60582945112.pdf
    • http://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/94539294557.pdf
    • http://grawerlik.pl/userfiles/file/82600669525.pdf
    • https://dalnoboy.com/data/filestorage/upload/files/30613720712.pdf
    • http://www.annaleehuber.com/content_files/file/66899067279.pdf
    • http://dataction.org/demo/dataction/media/famojem.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cdc61416b---5669454405.pdf
    • http://ufnk.fr/app/webroot/files/file/dumejo.pdf
    • http://przychodnia-felinskiego.pl/uploads/editor/file/baxidom.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16091d6d6e231c---37408780028.pdf
    • https://simondaulte.com/ckfinder/userfiles/files/ketomizuwafuwaga.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b002a00e0d---zisufudevowejokumejeb.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=a+milk+container+is+made+of+metal+sheet+in+the+shape+of+frustum
    • 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_off0000d1f0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F0 16792 bytes
font_01_sfnt_off0000ea07.bin
7d291328ba394ff2d82b4f6f4f4716c428e19e3b8395ff45fff7d19742a836c1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA07 11060 bytes
font_02_sfnt_off00010390.bin
c790307aff09a1ba24ab9b1cd74e0225d063920f6291c863c501be6a39b7abc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10390 18108 bytes