Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3c60d9d01a80259…

MALICIOUS

PDF

86.5 KB Created: 2021-09-07 03:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 49c88b733ce2e6e6dd5169aaac9ff092 SHA-1: 7ec48b6b73b4180092be01f2a08c0feb88e29c0c SHA-256: e3c60d9d01a8025947859061b274f98eca19645db2580dc163a8c69ec721989b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. ClamAV and ML classifiers strongly indicate this PDF is malicious, likely a phishing lure or a distribution point for further malware. No scripts were extracted, but the presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics points to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://unserbiokorb.ch/userfiles/file/83088851019.pdf In PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/tek3e25bpqi68tmf8438pa0993/660994503.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853b1064a40---botoxotelilololanela.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/smt0pr12v0bh1rs4cfl3pdjqib/68803525995.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/75844012477.pdfIn PDF document text
    • http://614move.com/clients/4890/File/39593965287.pdfIn PDF document text
    • https://izr.fr/files/favevewigevinoso.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/c032b6b27876f34cbc9099beb5a30771/45807223164.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a776da474cd---roroxuk.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/lakinusani.pdfIn PDF document text
    • https://bulendengin.com/upload/ckfinder/files/sujisaluvubi.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/jojogezoxagipiniro.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/8486843910.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9218073de---jepojaziwexexajomewimape.pdfIn PDF document text
    • http://cachnhietcacham.vn/Images_upload/files/runelodu.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/61276775185.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/e2d66ce08e0b8456a9c2702f31b1c44d/16966913225.pdfIn PDF document text
    • https://alutat.com/data/file/tanikufapevawa.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/6b57fb94cd742bdcf811b769695eeb36/59553079895.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160804c7a0d6ee---66885680185.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/2a2ddb6ae24ef0ed4467fda4618fef86/90242539577.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160d38c459f42c---12655201481.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/6df9382f844bac30c716a2011d95de93/pumojusefuwit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=los+6+puntos+del+acuerdo+de+paz+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10361 10808 bytes
SHA-256: 7b3b4a46a1fc10cbeacd1367e3e80c684d60057d01269bc000f25f4ec9cfa568
font_02_sfnt_off00011c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7C 18936 bytes
SHA-256: d8fc210c4ca958ca7d6f56b32909fb4213bbb440c78f374ce9ee1e5768e01a6b

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