Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bbc7ae237892b1a…

MALICIOUS

PDF

88.5 KB Created: 2021-06-28 22:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5bc3ce61dc58053ce81eaa0ce30151b5 SHA-1: fbdf3401f5bfb450302550b491d135e1f0cfe643 SHA-256: 6bbc7ae237892b1a4443887d11f79ac2fbb80b82374b7a42158924d63f8adc3e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://archism.ru/uplcv?utm_term=homemade+cocktail+sauce
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/0da174843cd15bdcbf9429c18f11fc1c/belovixijovikapuma.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160afb6f518b1f---39665722358.pdf
    • https://ikitellirezistans.com/upload/files/pemupikam.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609629a2835ec---44072600211.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/mhko4it9d7rbvoci5rek3a1vge/60791503254.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/f6cd454ab477a1f824d8092d055d1416/tolobok.pdf
    • https://eobliecky.sk/userfiles/file/womisiki.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecba2651f9---zenupijimarapa.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074337b0a045---boxarofitusimoro.pdf
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/1lav1p9tjkc8qp2kbvmgnvaj9s/belope.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083d7285ced1---gegaguvaxigatukeduzo.pdf
    • http://zhengfutz.com/v15/Upload/file/2021618256576426.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/bc1f7b93309c1345ff411da6f9b561e8/7458837009.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160adc2bdec211---buraturapegizaledadenub.pdf
    • http://al-bandak.com/userfiles/file/redajedameg.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d11ce3dfbf---26590339909.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/21ce532ba327e4536e4a4415e991d0b5/57524328590.pdf
    • http://bodegaadrover.com/userfiles//imagenes/numugatuxuvuvo.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a40d3b9d0---26897543174.pdf
    • http://isystemlab.com/admin/ckfinder/userfiles/files/87787063565.pdf
    • https://rubin2000-distribuitorshop.ro/userfiles/file/monefesopigezusewuxotig.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/c282fef3f85f849c937e35f371df0a97/47511239046.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/sbe6dj32oj6q1lfajhjd8e9uc6/57841225226.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/5t97s2dj4066c9d6p81qll938j/veloneziduduritazazuragoz.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c858aa8f781---22651297641.pdf
    • 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_off0000f669.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF669 16792 bytes
font_01_sfnt_off00010e80.bin
b2724b7f29eee47ff6203be11d2f3fff80a3ccbd476eb3579e6c78e36846ac22
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E80 10508 bytes
font_02_sfnt_off00012663.bin
8e50a0149d74f9994b3282789a1179d40fd10c293ab200d70bbe9a2298548755
pdf-font-stream PDF embedded font (sfnt) at offset 0x12663 17768 bytes