Malicious PDF — malware analysis report

Static analysis result for SHA-256 982c858ec167674d…

MALICIOUS

PDF

73.9 KB Created: 2021-06-29 19:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e16bd9c37f07d8cdf9ee45b61a286186 SHA-1: c8e7951c63e1b725bfdf002304a7578d6882a022 SHA-256: 982c858ec167674d5d1a40c530c0a75c265b2009fdfbde9066b208cf4fb6fd7b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites utilizing formcraft or super-forms plugins for file uploads. This structure strongly suggests a link farm designed to redirect users to malicious content, likely phishing pages or malware downloads. The ClamAV detection and ML classifier further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160961c75f1c03---5779831837.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6343688023---woluxetijiwaleju.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608887f9468fc---kenivuxinove.pdf
    • https://advance-pack.com/editor_upload/file/gujetabotunitedera.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/7234b2d9d4528da58ed83daf7f7c010c/99052625288.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090fe6211390---48000282804.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/2g8af5thv8tltdjaalrk7m42t1/85994039875.pdf
    • http://bluekeydigital.com/images/pic/file/18190311530.pdf
    • https://camping-du-lac-dijon.com/fichiers/24944027170.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c265bbf20f5---43291611653.pdf
    • https://cafepiolho.com/uploads/assets/kipubezifirefuzinul.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ecqh41c2t2590cqa573hid7m69/93903198936.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/iinmpd0kjva1di806389ro0bkj/92109284625.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/eaa917e535745b701c0b3eb09b063153/90941255207.pdf
    • http://buchtel1967.com/clients/26382/File/75206169669.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/45a7ba3b3c21996b3ee193b6534e18dc/17710617160.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4hh9e9nl2n0kb7tuai8ub6squ7/66488381420.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160972087522c7---fitedugumawebelugeper.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079e2d2630c0---pexasapefuvuxat.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ekodcff5m0vm48mtf41dl1g01s/dalojuxidomijupexasovet.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf5552c713---bejuvivuxixosemuvetewovo.pdf
    • http://acecaalcoy.com/userfiles/file/37410523817.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=and+after+all+the+obstacles+it%27s+good+to+see+you+now+with+someone+else+lyrics
    • 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_off0000bd1f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD1F 16792 bytes
font_01_sfnt_off0000d531.bin
c0404ea092a9225858b4b5092ffdfb63ab94f43974efe46dcac54b519d7da4ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD531 15732 bytes
font_02_sfnt_off0000fce6.bin
f313fd195f1f1e835e7d68387a9b26265ff803f48e6d8621bcceecef170cb323		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE6 11376 bytes

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