Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eea9604929325b1…

MALICIOUS

PDF

86.2 KB Created: 2021-09-03 08:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7345b66cc9b8398616c365ce9fabc6d0 SHA-1: 67d284973d187f1c740b2ef360fdec782a11b7c9 SHA-256: 7eea9604929325b1d74988bf770bade0a96b746edaa3dffbd30a149f75c851c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/64d537f51aaff0a44028569fb42b89aa/22460716795.pdf
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bf7ad6b50---96954137179.pdf
    • http://kibbkw.com/uploads/file/bedafanegiroritanu.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac5ebb1876---42765937614.pdf
    • http://sochistandart.com/ckfinder/userfiles/files/sezuwuvumexu.pdf
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608830120e34c---93924106016.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcf2a4ec31---pinukojur.pdf
    • http://phuocthuan.vn/images/pic/file/97222890898.pdf
    • http://gamaxmotor.cz/data/dokumenty/vijineparuvawisu.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160729d515a9b8---69205572063.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/6b9253598f83814b8ce93abb0f98313b/47579996055.pdf
    • http://phoiinnhiet.com/images/uploads/files/91465862742.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16102513b92c24---mubarefasefusefolebuw.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/a71543c8f7ff0cf9251881c160ff258d/xovamib.pdf
    • https://33mobility.net/uploads/files/peloke.pdf
    • https://nhachoxebus.com/upload/fck/file/76110050215.pdf
    • http://soflacops.com/clients/83266/File/jumokojozod.pdf
    • https://luminex.pl/upload/file/guraw.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/e0dd14666feb8988dff48f39bf1c5905/vadudatezop.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/9929c9b34f0b4ba280b0d18cf6f77a58/11595896605.pdf
    • http://plnjl.com/userfiles/files/seriborusixagojurolovi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=punctuation+grammar+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_off0000eb59.bin
d97a3125e59b938ce52a57f7d13d2e370bdf1b6d2432492059fb1e064ead7e27
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB59 18412 bytes
font_01_sfnt_off00011b29.bin
f1e84383d6a1c308634e745678261d76f5134b643dfd0021adb115d7214c62eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B29 10720 bytes
font_02_sfnt_off00013393.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13393 16792 bytes