Malicious PDF — malware analysis report

Static analysis result for SHA-256 5695299e3764a805…

MALICIOUS

PDF

84.8 KB Created: 2021-07-20 04:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 50878a0fe0a42dbf979fcf3d55824079 SHA-1: 2a6ae83b1003aa146cf8b4b08f606d3cc660c36c SHA-256: 5695299e3764a805f6a0370b8bb4a6d8e80f9ce8f28fce18389ff1f2735e1781
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to WordPress upload directories on various domains, suggesting a link farm designed to host or redirect to malicious content. While no scripts were explicitly extracted, the nature of the links and the detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/6dc9baf0f80c088e8d58deb9154361e2/24223774041.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a584200fd9b---ginunexal.pdf
    • https://heatingboiler.ca/fck_upload/file/42894466984.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160798ded630fc---89184221701.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871c8507ae1---duferiperakokokonex.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984af606a97---lozevarakeganub.pdf
    • http://interstyle.org/content/xuploadimages/file/5338668800.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094d1e3b1d4a---31821623608.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160910e720be31---bagolanigagek.pdf
    • http://didocrosby.com/imagenes/file/museman.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b988a0ded---18511114420.pdf
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/jupewadigo.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1c6e0d31---motakekekojojakagobuwobuw.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0169bb55f---jiremojinarumifa.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/a8012fb99af56507eccf23b89f6b3dbc/zexexipiwimesenejudom.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/6bfa296c0fe800cb83d9c72a34fbde6f/97825128317.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8a4872729---livugoxupe.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/5ac56ce7803445fe7310b50a275b1994/62237130600.pdf
    • http://straub-online.ch/userfiles/files/48099357576.pdf
    • http://lamorenj.com/userfiles/files/nasedojiravirug.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cade939dc05---tulanusakirolexawabu.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075dd751ee9a---11173602537.pdf
    • https://bnbcostaverde.it/userfiles/file/72592165026.pdf
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/zamokinafegesajef.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=carly+rose+sonenclar
    • 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_off0000e867.bin
d15c8012e2f52723dda0d7b176af9a99716c10ee092574c21fdf010eb1cad80b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE867 10180 bytes
font_01_sfnt_off0000ff60.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF60 16792 bytes
font_02_sfnt_off00011772.bin
0f651962f621fa25e87d0a1462a5e2d9b5c465eeac6448b90003416373534d2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11772 17712 bytes

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