Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e249ef3f09dc2c…

MALICIOUS

PDF

102.5 KB Created: 2021-07-03 02:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2b399ba283afe925d16875f968a10fab SHA-1: 2c88f4dea2a0051f84b27e7b1bb937f138fa4127 SHA-256: 94e249ef3f09dc2cd69fd758a2f0054591d18599a378ac103c25e7cd74938b23
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. It contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, suggesting an attempt to redirect users to malicious content. The PDF structure and link farm behavior are consistent with techniques used to obscure the true destination and evade initial detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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.hydro-tg.pro/upload/file/winulajeregidixosedo.pdf
    • https://pharmnet.cz/ckfiles/files/files/26813435732.pdf
    • http://ankamet.com/userfiles/file/pokosasegid.pdf
    • http://atomleasing.ru/media/File/28835232491.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607079613e9e0---laser.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d8a4d2920---xiviwozarojalotope.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7938dc3e4---19642569517.pdf
    • http://www.tekkoo.net/images/library/File/83471401090.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/c778ac1d8b4b791f7fb6752f9971c8b5/14175233138.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40b26ce771---680015703.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/mltf0qr88474up4n68bht056ra/60504369593.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86697da9fb---vazogadanipeborolire.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/45d84a9d55a0fd3c90b8d8a96ec75173/gikubivabeseniv.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0c002c4be---66582068332.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c865b2942fa---nezufesixosutodemowepof.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609621f4d7110---venasejemifan.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/735b37d346b88bb6d101ab297c42e780/sagowaz.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb91ba8e54---70375041520.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/bde50484f3370bac3be0b9328ec8aa28/boxebamevufesusokurogup.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/abda9e8fc8befe0def14bfc136687ba9/mefipanexosaduvijonaxa.pdf
    • http://logistra.fr/ressource/site-image/files/rofugomuni.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/a6247f7c503b7be2ed2567cd0427f3bc/muretikagugujixowikigobat.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=speed+of+sound+in+different+materials
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/d69b581a0aea6af1a1c80c1bb62576c0/wovivumug.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_off000128a3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128A3 16792 bytes
font_01_sfnt_off000140b5.bin
590a740a73c05e5428e81d71e2bbfc8b41282233a41287c5f53b1ed473e5ba3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140B5 19944 bytes
font_02_sfnt_off00017324.bin
4cc5fa6979c8d351593e55d4ab213fd18404a3fe52de60333e50f2058c4a9ad6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17324 10832 bytes

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