Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa206834c6e4beb6…

MALICIOUS

PDF

87.1 KB Created: 2021-07-26 14:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 572d01f25a11174580010c83fd421769 SHA-1: e4ff9ad47a22d4feb92fa7ef2516c912df3f103c SHA-256: fa206834c6e4beb6ee15094d00610fc3e8a19a67ea895ef58a26019218cf1e1d
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These links likely serve as lures for phishing attacks or to distribute further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5bd73ff9b---53896120032.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2cd776c16---vapevikivamam.pdf
    • http://seksdagen.nl/userfiles/file/daxasof.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16094567d54c27---jojopikutir.pdf
    • https://fo-prefectures.com/pages/files/65445556509.pdf
    • https://tailormade-sales-marketing.com/userfiles/file/tosuxixud.pdf
    • http://highendschmiede.de/highendfiles/file/meguzasiniz.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/2aeaa625acd4f402694d5c819167388a/danirobinuxevibovif.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/ta3c5o6n41c5dobll1e0223hf3/xejuri.pdf
    • http://sosnovgeo.ru/userfiles/file/76616385826.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/a37af0b252956cc29fab4698f20c6724/wasuvawijubobejaxupedotip.pdf
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/66be53651b888824cb877e1d82b5c735/rurifosidazizopim.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe85caf6ac---notozakiman.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3f99146c0---vulejupilewefe.pdf
    • http://kgmda.com/upload/files/66325178938.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e9c1e1712---bilovapanufifobol.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/d7saphaq04m0f22oe21tn7v051/vitiporexeledasulovujed.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/a50a62575144466a8b6f783db761f079/50213727342.pdf
    • https://f27szerviz.hu/upload/files/63103109619.pdf
    • http://normel.org/files/upload/file/92607303360.pdf
    • http://winso.tw/userfiles/file/vajigamuzirisuxamakife.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5725bef91c---jewevalolazalomokumogavaz.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdc49864e7---17326868204.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/m7hs7plov24jvrssna747nh4i7/81794214078.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=koes+plus+keroncong+cincin+mp3+download
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce33.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE33 16792 bytes
font_01_sfnt_off0000e640.bin
6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE640 1692 bytes
font_02_sfnt_off0000ee49.bin
ec6029bef10558d8c773b351f2b95559bac1e6a1602aee9e5b31ca2dd454b28f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE49 11200 bytes
font_03_sfnt_off0001085f.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1085F 16092 bytes
font_04_sfnt_off00011da0.bin
56234c276e60e6687e94b2dc087b8feee236da2be00a9cf0c76fc7412e6aff7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA0 18408 bytes

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