Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec0c6b7e2f7eb6ad…

MALICIOUS

PDF

95.7 KB Created: 2021-06-27 13:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8250bae6b95305e0b1a51ac7d11b5a53 SHA-1: 16a1b87eabaf874dd305f1ad282ca1c56cd55617 SHA-256: ec0c6b7e2f7eb6adfc95aa3d1bb1b8c306d664e6c14b23167277033578a08fc5
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised WordPress sites. The presence of these links suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://infrive.ru/uplcv?utm_term=female+blue+and+gold+macaw
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/c52d09cca75c6924971aec975de526a6/xojetujuwebegulowazaj.pdf
    • http://olympusflights.com/files/files/ladap.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/hbv9led8e59s6hd7g70tt77533/zomawenazazok.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4475f3ef5---27230684065.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/694de064f2bdc7868500a637f1837c53/sixoxupogipajokevubogolu.pdf
    • https://roc.mn/uploads/files/jivanomovati.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/3j0ds01epcjh4bbm2vu1to415q/14886535409.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/4fc50ab30dfe919deb08cfa3d2d13233/56141115488.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb78c6c8dd8---27939744339.pdf
    • http://machinegroup.ru/img/outer/files/23530283874.pdf
    • https://arerp.kr/data/file///11838429166.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16096d4c9845f9---61370842622.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a873b8f343---47954585692.pdf
    • http://asesorgubernamental.com/images/file/57244843218.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b222fdf0ca1---60222958979.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2ace252f0---32285958119.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/497f4d61c500dafe4a47d22b9794cd23/21953445766.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/75425462ac3c26fdc7b48ad100173a74/rufukoxip.pdf
    • https://vannordenvastgoed.nl/userfiles/file/zevodalobamimijixot.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/3441868e3c4359c530b0980666747464/disupuvomarure.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/dbd4a3619261ee4a6eea05c8d1e04ad9/bajonapelisaxezanuwu.pdf
    • http://buyyoutubelikes.com/ci/userfiles/files/xivugenitibap.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bca5f2cf10---jelozivapoxuzenat.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/c2s3sv2j7glsg1lfhp138etbobp2mve2/79267151301.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/qv48sm9me8dbe3rk9ke6pmc9e4/7019755771.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_off000112db.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112DB 16792 bytes
font_01_sfnt_off00012af2.bin
ac872cbaa41902fbe4692bd87c90bc621357234bc797d3165ebbc0c1d141acb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF2 10556 bytes
font_02_sfnt_off000142c3.bin
0df8253c1f1e48dcaeddfe71fd7132fe507db6230ec0451ad7f09c26719fb76f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142C3 18100 bytes

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