Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe85017ffab7f4da…

MALICIOUS

PDF

88.9 KB Created: 2021-08-02 07:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aec3846f1880cae9291095e06b31b845 SHA-1: d109c773af89992e65de873ef366abb9ef09f963 SHA-256: fe85017ffab7f4da8cdbc011afdbc635dbf8c85a7a5888101722bf2d00e95317
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it's a link farm pointing to compromised CMS uploads and disposable hosting. The PDF contains numerous embedded URLs, many of which are hosted on potentially compromised WordPress sites or directly on IP addresses, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the overall structure and URL patterns strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/vlk5a22itjt1t2an3a8crokra4/limasarofaj.pdf
    • https://radio-aurea.eu/files/file/6448197513.pdf
    • http://phantasos.org/userfiles/file/sipami.pdf
    • http://vanharteyoga.nl/uploads/files/55724690122.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087983c923aa---26910490418.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec3f3fe1925---gumitafosetebogabumaze.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dc3f1d14f---porosom.pdf
    • http://micronforgacsolo.hu/UserFiles/file/80562304970.pdf
    • http://www.chubsorn.com/file/files/zatefotiman.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/5in3cp965r4p6ng9q16ihlg4c7/juwuvoz.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3653c357a---ruzefumaj.pdf
    • http://www.derbysignandgraphics.com/uploads/file/64464941717.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/7b0328033b3a20e77d748399b1bffa5c/16905148721.pdf
    • https://kermoulin.com/userfiles/file/xuvirakukuleloximemoral.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/2392e1b256ea2fce6ef76913a3d376b3/fomewigeselebosopajexu.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed1c11ded9---24982780516.pdf
    • https://aucordechasse.fr/vosImages/zigejudaxexoxipenurovowe.pdf
    • http://viviapalermo.com/userfiles/files/zapufuwetisafa.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8unpf9ds1v8hh14be5c1fqdqg0/nigugurepum.pdf
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/c3570f7550a528ff1f2fa94ad846f314/33441379083.pdf
    • http://alpinist.store/sribati/editor/uploadfiles/pajuwapopefusanetegujeku.pdf
    • https://finomisgurukul.com/public_html/userfiles/file/40764118819.pdf
    • https://jasz-pap.hu/UserFiles/file/59450030561.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+tell+crystal+glassware
    • 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_off0000fa3c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3C 16792 bytes
font_01_sfnt_off00011253.bin
22a0b70e1757f691d1b72ccd593d12c29fbc5062afdccf083c5e40d08085cb03
pdf-font-stream PDF embedded font (sfnt) at offset 0x11253 10400 bytes
font_02_sfnt_off00012a20.bin
d9e0c648e2a1b7a06e34067b4badc93407e6b98d8a661ac97c9987c23a39205b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A20 16540 bytes