Malicious PDF — malware analysis report

Static analysis result for SHA-256 482f23547e5e7e4d…

MALICIOUS

PDF

90.5 KB Created: 2021-06-30 11:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b3c97b2156b658c0ed230c6ca4303bf7 SHA-1: 55d97d638c1933cd4342cd1e52c940599a4e52f0 SHA-256: 482f23547e5e7e4dec955347eb9bb35eca02f340ec09cd5d1142f69c36f5fc94
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting. The primary purpose seems to be redirecting users to potentially malicious content, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://munord.com/wp-content/plugins/super-forms/uploads/php/files/666f7bfca95c97125132a8cc3fbdabde/wevefekegikopawabig.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607085208b688---najusivatukokax.pdf
    • https://www.myosiaffiliate.com/199trust/img/file/fovutizagoferunanuwof.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ec7046933---gugikubadir.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/1d7dc7035a0ad1655f512ce0b2ee329a/defofetidemagadazowedux.pdf
    • https://summit-christian-academy.com/scauserfiles/files/40039427447.pdf
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/xalaf.pdf
    • https://aspirans.com/files/file/votidusurefegegubedaja.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0b515412a5---66339515006.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7243939e83---96866591330.pdf
    • http://infunplastic.com/d/files/24808924747.pdf
    • http://eltonltd.ru/sites/default/files/uploads/dumizasorotizipaz.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be8fe54b0a0---79393655818.pdf
    • https://preprodpcb.com/userfiles/files/24004649323.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5a303266b---totiwazuzuxeseneb.pdf
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/01bc3543ec2492426629ec9ee9f1b3a1/latepaduwodateri.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdfcde53e2---63705606352.pdf
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/wosevali.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/3622c660904b21f0100f4377ec1e8a72/nekajejuvite.pdf
    • http://am-assets.com/aom/magnolia/userfiles/file/doliguxapexuto.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984ebbbbeb1---fenumixowakozuditumiju.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607800e5ab288---bipunagugusizafolugamepo.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1d75d6a73---10654878265.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b93558dd3fe---23773320979.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=pulled+lumbar+muscle
    • 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_off0000fdb1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB1 16792 bytes
font_01_sfnt_off000115c8.bin
c395a3a2cb1c063d69b64064808c9b5ce9952a61df6a5198b894b43129b418e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x115C8 10356 bytes
font_02_sfnt_off00012d31.bin
309cceddfba823c5b8e125aa04c5523d0cfdb7379883dc2d64c3fb9e051f34d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D31 17648 bytes