Malicious PDF — malware analysis report

Static analysis result for SHA-256 60724faf142ed196…

MALICIOUS

PDF

70.7 KB Created: 2021-09-02 22:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 08560444d685b5962b6b7fdf3ed690aa SHA-1: 01349dcaa6008b0fcdfe9bb9447e9699faecd438 SHA-256: 60724faf142ed196e5b6d69e5e36c4c80d8dc070689592245ce3357887b3c1f4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with numerous external URIs, many hosted on disposable domains or compromised CMS uploads, suggesting a phishing or malware distribution scheme. The presence of embedded JavaScript further supports the possibility of malicious code execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kibbkw.com/uploads/file/buverilepiliviwozagevafu.pdf
    • http://maydangson.com/vietkiendo/upload/file/fegufademujipu.pdf
    • http://pathtojanna.com/userfiles/files/fenuritowotuvedobox.pdf
    • http://lorichphoto.com/pictures/file/47394217303.pdf
    • http://xdata.pl/app/webroot/img/ckf/files/safutaligojubafa.pdf
    • http://grandrosso.com/js/upload/files/2999375829.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/85e2f3ef9e266dde346fed8ac0750c0d/71473868515.pdf
    • http://heureka-cz.eu/files/wubuwedo.pdf
    • http://aaaexpressac.com/userfiles/file/13568870463.pdf
    • http://elitsatodorova.com/uploadfiles/file/wizuvokiki.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0qsgs0he8m5v6jr2mm2s3alus4/rubewikefaxi.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/913c287c6e55159fa5836be5560c1eb4/1410646188.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/7b03c785d082416a66fc2ec46f12cb3a/86942377805.pdf
    • https://thietkevuphong.com/uploads/image/files/36075554320.pdf
    • https://aawyx.com/sites/default/imageuser/file/lozupizijekaluwevuganoged.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607023c9f1130---22914140334.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8677987d9---tekusodovifotomixubixi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=finding+equations+of+lines+worksheet
    • 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_off0000b1e1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E1 16792 bytes
font_01_sfnt_off0000c9f8.bin
1516b43bcb800cfbf57c13114f55d7d7ed081ba64030e3eefb5326e9725226c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F8 11036 bytes
font_02_sfnt_off0000e317.bin
8659dac828064761d94d072708106be722dd29749467fe2be702896fb2373814		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE317 16580 bytes

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