Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a8d96005fba463…

MALICIOUS

PDF

89.8 KB Created: 2021-07-06 23:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1e2dec9a0e3e9ba389d2c817f9ca2ffc SHA-1: 52cf47fe072ac83d2af838292184bf5c615a9801 SHA-256: a3a8d96005fba4632787a09c2f746d1cd27624ef4922e652e09cb8407733b8ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to websites hosted on compromised WordPress installations, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be51a049fb---nakamabobum.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/495542c2b6db7d29e1581462de473551/4234783486.pdf
    • http://garmagostaran.com/Upload/file/68667470905.pdf
    • http://vinmexindia.com/uploads/zekom.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607859cd566b6---waladew.pdf
    • http://nfrostov.ru/upload/files/67982970353.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/11cb0a8b10ea352ae16022e1576fbcae/64336952241.pdf
    • http://elitvorota.ru/f/file/94499970879.pdf
    • http://gakuso.jp/image/_ckimage_file/xijuzewagibidusivovebosib.pdf
    • http://kursadowicz.pl/Upload/file/50303958136.pdf
    • http://aggengr.com/uploads/CMS/file/1280451829.pdf
    • http://cbcom.eu/ressource/site-image/files/jusofajalefasanijelezidu.pdf
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/8726eaa57d5b757b9b26316fa4fd7ff6/95212424222.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/2790af3356cb2164a12ad80aa1907228/surugevenune.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/dd1173d051dd63c46dd1f8985d0984c6/31478195454.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/45934324883.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e16aadcff3---24408160779.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/1a1fb891a1b4b6a527fb58c6587b42a8/fiwamizejoruxujoso.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/1691a80d9e726d19365693a6cbbc8150/58026521710.pdf
    • http://akicgiyim.com/userfiles/file/69757232800.pdf
    • http://poorclarescork.ie/images/tudaweratabozigazerixad.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/3ca075ec5c11449aa97ccef1ffc3ae45/lezufokulogitekenewitov.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2dd88561f---10914290414.pdf
    • https://k-newsletter.com/ckupload/files/85748686841.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901562275a7---bigomaxexurajop.pdf
    • http://debden.org/userfiles/file/29205803376.pdf
    • https://unitedfightalliance.com/ckfinder/userfiles/files/wetuzuwa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=think+and+grow+rich+affirmations
    • 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_off0000fdc2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC2 16792 bytes
font_01_sfnt_off000115d4.bin
a8c72c983df5b2b939d38be6d5cc79d549850bff42a16df5c498a6dbda77c8dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x115D4 16752 bytes
font_02_sfnt_off000140f5.bin
a45a9901b0743df906e2776508685c38de276dcdf833796eda1ea6dc5b9e705f
pdf-font-stream PDF embedded font (sfnt) at offset 0x140F5 10888 bytes