Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c2f733e1fd7517…

MALICIOUS

PDF

86.5 KB Created: 2021-07-03 00:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2f9e6e854ccb61541556a51eaeee5ce0 SHA-1: 2da32f54906f646444298e4df0943b693ccbcec1 SHA-256: 89c2f733e1fd7517916daccc6c0c07f9d42a0f8972ea46a953ec29fcc888f42f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of multiple compromised CMS upload links suggests a pattern of using these to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://crewmak.ru/uplcv?utm_term=bhp+mike+henry
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/qprd745nu8imj5h9sksq0cnbfj/wupopatalugigosuxo.pdf
    • https://cottonweb.net/userfiles/file/76494464114.pdf
    • https://bruceautoservice.com/files/file/62635070882.pdf
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/dilixisinasikal.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/60d7a06400674faddce7ea6198fe9046/dutuko.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/97d7e4cd7ef405eec5cd1251fdba539e/buxujugowowegevenodirosaj.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e203d1b421---2920983436.pdf
    • http://lightningriskassessment.com/ci/userfiles/files/39938412328.pdf
    • https://bharatbiodiesel.com/userfiles/file/45799939265.pdf
    • https://bestofbucerias.com/upload/file/xerena.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/f16djel47la2rjg8c8o3q8u558/samadotod.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b515d889f4---fabizinavogisitivofugolen.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/c6a5054916573356f31cda0513bb91ae/wasonotoxedatikatoxoxos.pdf
    • http://liburnia.pl/userfiles/file/97467926864.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa13449df3c---16400427280.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce915f2857---dosil.pdf
    • https://ka-base.no/images_content/file/dikuvokuxikafujilirig.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d0b23ee13ec---36544641098.pdf
    • http://tvtamminhphat.com/uploads/userfiles/file/bupewepiludulotidasigo.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6f802b575---86349912627.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/55c7781ab05b1fd12ead5b638d411682/mosomawikepudoxugosoxogu.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e014b529e7---tezafugilipaxu.pdf
    • http://aep-tc.com/cache/fck_files/file/52271877083.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ced7357442---84377314751.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_off0000ee80.bin
e34ca514d6dbb8dc2f3382ccc956a2757e9f448caacf22ea5e1bb0ef6a825c30
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE80 17988 bytes
font_01_sfnt_off00011ce8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE8 16792 bytes
font_02_sfnt_off000134ff.bin
989a61d3b6145e59c22c4a1b7cf0f262e9cb0a6a1b758751480f17c8e137ea4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x134FF 10184 bytes