Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec3224736b03708b…

MALICIOUS

PDF

89.4 KB Created: 2021-06-28 13:37:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1c13919be68ab7fed3963e7176419c3d SHA-1: 226fb137556b5592fb56b152af71808d42aa46bb SHA-256: ec3224736b03708bb5136e6e59118f55a99bcd8f019656d241893f18f70f60e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations. The presence of numerous unknown URLs suggests an attempt to distribute further malicious content or phishing pages.

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 http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3eae77f889---rasejupeniwometedufote.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/dc2f07ac3c0feecd7f836f4775dcb70a/18019997334.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160702eb5e8acd---45076519714.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee480e5c02---71222711749.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc848a099a---pazasa.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/1b046pt5l87a858eg226f97fg6/94249093365.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2a1202ae7---53048839686.pdf
    • http://stark-tools.ru/images/uploaded/31281368551.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713c382b4c9---fekalovitutupaxexapejupat.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a26a6bb37d2---48848127121.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/68a89dba252a74153e5d30cb6292c790/97019015976.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/8a8fea465e3b6d5dc6edf8afa27bae83/ralaxozitukopunutegu.pdf
    • http://fanti-fitness.pl/uploads/assets/file/sukutebutawezewisibuvezuv.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c39b0762338---32718348269.pdf
    • http://angelescare.com/userfiles/file/29274187410.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/gfe6csgre2ovpfu7ktvmng5i41/84723444138.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ba06c7403---76545201614.pdf
    • http://jmvlpslimited.com/ci/userfiles/files/nelupubamiwetovuwopamev.pdf
    • https://easybuildapp.com/files/uploaded/files/35082200438.pdf
    • http://vestmorecapital.com/images/epost/23758243380.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16091caefdef96---61641981431.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16084f07bee995---timewal.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d29545208c7---90191863478.pdf
    • http://henrycrawfordreunion.com/clients/1/19/1929e20d1ffebcad6d8b2a659e9c170d/File/tixalevuvan.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/d4015318eb9411906d2e1cea753d0073/53226412126.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=what+fruits+can+ferrets+eat
    • 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_off0000fba2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA2 16792 bytes
font_01_sfnt_off000113b9.bin
e25bd88b00b4c20a7319de7cde502edc81f8846c37cacd535873f9c1f336f60d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113B9 10360 bytes
font_02_sfnt_off00012b1b.bin
34d8d6ae99b90131f31d4326010bec9cd2fdcb78ca45578be42420dc409cd751		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1B 17260 bytes

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