Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce7895bdf0f5f51…

MALICIOUS

PDF

86.9 KB Created: 2021-07-07 21:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3811b8c1376ef5b64c24aa358a9dbc95 SHA-1: 4d39aad4753e505db44243becdfa33c78c853f44 SHA-256: cce7895bdf0f5f51d2a5947ae7446824574e95b640279460a697c68a0c8272f9
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as containing a link farm pointing to compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URLs are likely intended to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/ac0fadabafa8c6a2fdbb5c8816036d13/pizuzovexadinuriju.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf1c04bdcf---83616874767.pdf
    • http://vallovin.it/userfiles/files/17933807797.pdf
    • http://ehhs1969.com/clients/6/67/67a0fa02f482ea8575b7cec7429e43a8/File/70620523301.pdf
    • http://asfalon.com/__files/file/58426733015.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b7568c95023---30622229097.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/a791e4dbbc14e46efcf3997c306100f7/jeberobezakejaza.pdf
    • https://louvre.lv/res/wysiwyg/file/durose.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/7c35c93e965006f61941ece310d36c04/fupanuzagiponelabifixaj.pdf
    • https://tungqibiotech.com/upfiles/editor/files/14419468758.pdf
    • http://kolaykanal.com/userfiles/files/moganibasedurokasusi.pdf
    • http://czapla-dachy.pl/public/images/fck/file/74749521229.pdf
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/xiwajonax.pdf
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/22fa228cd7ff7d38c567ae543002948a/28214356862.pdf
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/82006633267.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070490c33671---88360084421.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbd20f0043---1003616010.pdf
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/3d175d97d3c7226a2bd0ef86fb8e1fce/96262748823.pdf
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/nuxutokikudodirejaju.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076b80530a1c---ropurokufagemunejub.pdf
    • http://reelproductionshd.com/userfiles/file/82016578440.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=hd+streamz+for+tv
    • 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_off0000e735.bin
fdc22756db0e37b304a9c8db41b3db6fa1b08926fa7784d11929aec3fa109848
pdf-font-stream PDF embedded font (sfnt) at offset 0xE735 10392 bytes
font_01_sfnt_off0000feca.bin
85ad3b17da0514732619cf68e6eb911770e33d57cd9bc21a0aef9cb2b094288d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFECA 26500 bytes
font_02_sfnt_off00013709.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13709 16792 bytes