Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc6d204c0a1cc75…

MALICIOUS

PDF

91.0 KB Created: 2021-06-26 23:41:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: abda30f93df4983e9fc8578cc117f9af SHA-1: aa656d38c1f06c41c37b10a9156901a07309aea4 SHA-256: 6fc6d204c0a1cc75e1bfbf70a7751cc129b0ab4c2917ea4edeaa582b0d96c9d2
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/jn8rh4h42pidn4dknt5hj233p6/9343286256.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/04d87eb5697788fb28a93d6428f45ece/dolabe.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c864d3166ab---92469576841.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1a33c6b73---lovubuzupujujumari.pdf
    • https://adepotcustom.com/UploadFiles/file/20210430052102145.pdf
    • https://systematix.pl/userfiles/file/70910264222.pdf
    • https://andrejc.si/files/file/45190755157.pdf
    • https://questyme.com/userfiles/file/xilekotuwuf.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/51a0ae9e1c645fe96644625af0d82384/tovuxofikenijoniri.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d2f42d085---35354727391.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/zowudorimoxi.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/29scv0r6cgt06l2vu6ar7mdhcb/36014947062.pdf
    • https://sonarmusic.hu/up_image/file/11575224631.pdf
    • http://vitanova-cattery.com/upload/file/parelaj.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/lbl0pdts6ugo1oouj4npsfpl9a/53243610792.pdf
    • http://biswasi.com/userfiles/files/43617206925.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/a5c816b295d35ac40e056f58d6c02570/5997622816.pdf
    • http://hcvitamin.com/webroot/img/files/908866346.pdf
    • http://atek-ent.com/upload/file/dixefiputapusoga.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cfdc848a3---kegewivi.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe60a91227---sawitaxesew.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb2458ed6f---19822659997.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/nfnlkkkd3vjbljvvsonbuk02l4/nivafidurano.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeab0c34d57---51524140055.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/e53jpc4fnhurvao0aj986mk205/38317038831.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=what+will+you+do+when+you+see+jesus
    • 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_off0000ffb6.bin
937d7468b59b09fc6358140245d0713080c01342c580792609bbbdde74c1f15e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB6 10668 bytes
font_01_sfnt_off00011823.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11823 16792 bytes
font_02_sfnt_off00013035.bin
cc49ab09675542917c4db08b81ec7672214fc50e26bf5151b9b1cdf3fdce1575
pdf-font-stream PDF embedded font (sfnt) at offset 0x13035 17932 bytes