Malicious PDF — malware analysis report

Static analysis result for SHA-256 312411ccc35ff451…

MALICIOUS

PDF

91.7 KB Created: 2021-07-14 01:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3982b22d75b100d93e11e51915fe6124 SHA-1: f6fa7c6ab638d21f5ec85e945910a31589a7e79e SHA-256: 312411ccc35ff45172b0fa3ea576d92784c8bacc26ce196c286fa1da1e568989
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to various domains, many of which appear to be part of a link farm hosted on potentially compromised or disposable infrastructure. The presence of these links suggests an attempt to redirect the user to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://accessiblevehicleservices.com/userfiles/file/benoxor.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16070f5b982d5d---37434154088.pdf
    • http://amadpich.com/userfiles/file/93734033171.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff0f6ce68d---xoxojibesisapavemuko.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d755b838d2e---zazerufu.pdf
    • https://ahha.az/userfiles/file/dekijumotageka.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608618fc40c22---dukeseparulu.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/t016pugmecnl1vskmatnhj8q6p/62118945290.pdf
    • https://sy-tech.eu/file/detiki.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/b9eec6ad2ba78d4672821fc992c0ef63/97317834613.pdf
    • http://gilendor.cz/userfiles/file/94895022677.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160b188f6ddc75---banuwotativupumoxevoxenev.pdf
    • https://hr-serdahel.hu/images/file/gatepuzuzazemigumodadiroz.pdf
    • https://pomacanthe-art.fr/imagebeforeafter/files/fonirudapipuvuli.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/92p48thbed3j1oblgrgf5fcqs1/68205904603.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160d6e9aba0f35---gabewemowu.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e416bc4a2---sezafuzitesenimalupaxo.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/6d1c09f88d919a7fe6ddbd4385827d1f/86381163829.pdf
    • https://theatresaucinema.fr/uploads/file/69870474088.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/9oiuu2h2cdt094lmethc9er23p/96599406366.pdf
    • http://tsg-edinstvo.ru/userfiles/file/85393422469.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b06b5a7f3---xogixejagisofeviberibeg.pdf
    • https://cape-electronics.com/media/file/63277790445.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e15f3991004---nodijurejozusogolijid.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1607df26845231---9555540242.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8bc59bfb9b---litexebawefugedegirefa.pdf
    • http://zonweringnederland.com/ckfinder/userfiles/files/55168859832.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=funny+school+book+quotes
    • 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_off00010631.bin
2ce50eeea08cd4cc64912b5e8bf8cddf9c1a648ae182a9976aab0a476f6a4fb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10631 16760 bytes
font_01_sfnt_off00013154.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13154 16792 bytes
font_02_sfnt_off0001496b.bin
ed72ef93f11064adb3b7c0da85a3f74468aa2f6edbc5b309c8e3c040465132c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1496B 10544 bytes

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