Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3b386eaf52c90e0…

MALICIOUS

PDF

105.4 KB Created: 2021-06-25 15:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1e28b125e4cfae39613ce13c1fac1291 SHA-1: cf9cd5e3caa6ad49d0d0e0a2e28781620b3030a6 SHA-256: b3b386eaf52c90e08c41f1597270b01255a0ba79d008b117e7db0c51e6159a84
156 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 functions as a link farm, hosting numerous URLs that point to compromised WordPress upload directories and other disposable hosting. These links are likely designed to redirect users to phishing sites or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://tusenfotingen.nu/anvandarbilder/108/files/vakip.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a52e8684088---fafilurumale.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c3084e7c8---87957659821.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/160822df492bdd---15096594043.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/vjpqvnq9ult76ke1li569msugn/gobar.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/8533b94fa9542058a56defadd68bb4b9/92588770580.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0552782d40---19022692976.pdf
    • http://haai.org/upload/file/debemi.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9d12370f8---59509496649.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/9vbbqd3gtnaf3ghud6vj02gff9/61226087835.pdf
    • https://theatresaucinema.fr/uploads/file/72892928745.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/2ecef700ba17b71a44b70d0a045268a2/timewatuxibabidixazeneza.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3cf59e9ef---90401878722.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/tqrucru77nuavfv78plm09t8j3/kibivewanemovefimevijo.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdf501ae39---5791729294.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7b45e4f7b---12818018595.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+calculate+buoyant+force+in+water
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a92.bin
6972fa03ae1f196116de6a6ffc89f8fbccd69562ea021a59eeb210b2d487fad9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A92 10592 bytes
font_01_sfnt_off000132e5.bin
181018803bafb2af33a5c5670e5394efbd9e69123b71af9ce64c369782bd5d1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132E5 19732 bytes
font_02_sfnt_off00016747.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16747 16792 bytes
font_03_sfnt_off00017f58.bin
d622904cf062b5a91e7f590e4a857f128f41e426ef60400150c936a16ac82974		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17F58 17064 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.