Malicious PDF — malware analysis report

Static analysis result for SHA-256 90bfdf31ed6bb7b3…

MALICIOUS

PDF

80.2 KB Created: 2021-07-02 08:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af5760ec17038ec3c4acd90780178b6d SHA-1: 2a8fad852d4628f98d9a654786666cc631ec4b89 SHA-256: 90bfdf31ed6bb7b344b7334c4dd06b9b3ba6fb950d077399f152605fca9dfe71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, directing users to numerous compromised websites. The heuristics indicate a high likelihood of malicious content, with ClamAV specifically identifying it as Pdf.Phishing.Trojan. The embedded URLs are hosted on various domains, many of which appear to be compromised WordPress sites, suggesting an attempt to distribute further malicious payloads or phishing content. No scripts were extracted, but the overall structure points to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a098f3e7ff---fepabopawefudiradifaratez.pdf
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/lafuni.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd20b57300---72347812373.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/e5o1moof4njqjanen58cs8noju/17847367654.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/65f931b17d76bfd4dcea5d5abbb6f415/41234037731.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cd8058d6ed1---saxuvifazaralepomebezerol.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5d6b60c40---kerodukodabipi.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607947d0ee265---74477733937.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/af08c1ac69a365d30846d44ec50566a3/rejanuwaxi.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/1s7oiqk24l9pad5kcc44jlq8sj/30978128313.pdf
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/tapafurijoxowivaj.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/a366f83ad1ae9e1f568c7f87bfd6d5b5/pawekarujuwizupiguw.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/votiwimodafida.pdf
    • https://acryl-bg.com/userfiles/file/jekojekexerewavebit.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160acea3becdc6---68129007401.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/n7b3rjib3ifri9dnbtss99t5f0/jubedajofivevebubagobutel.pdf
    • http://rhodeislandalpha.com/clients/56223/File/19013534190.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16084a057c4b5c---nuturuzurotejizivezemikan.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/67m36cf32pcn9eisurmge4stm1/vawepavijav.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b0946e53647---bidabe.pdf
    • http://nemdanangpho.com/uploads/2021-06-14/images/files/mefinutixaxajikazeketomuw.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/e1qta606qg40i3s02eipshl590/zivozuboxa.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/31fbl064ptmqhe9n9uum6s2fj2/67925509127.pdf
    • http://yangs-ns.com/ckfinder/userfiles/files/20210619110207.pdf
    • http://fredericjean.net/oplusco/file/97618317013.pdf
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a6c17992f---depajav.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=complications+of+hyperthyroidism+include+all+of+the+following+except
    • 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_off0000d4a6.bin
f00c88936f7bc9584b720983ba06adb896eda47c2da55da418dafbf1402fe6dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A6 11500 bytes
font_01_sfnt_off0000ef8d.bin
87844f257d172cfd6a189d2f7503f4bd95cd4b7419eb72e78ee916d3968fe269		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8D 16500 bytes
font_02_sfnt_off00011ab2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB2 16792 bytes

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