Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d926fdd1205c685…

MALICIOUS

PDF

70.3 KB Created: 2021-09-04 01:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1ac99a28037f1e6caf52fbb033c14f51 SHA-1: 79cdc18045791fe0f46646f77a714dead1bac52d SHA-256: 0d926fdd1205c6852ce885e31ac6f6b4c5c844e1611f42b0b1acb81444964470
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users to malicious content or phishing pages. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://donauwell.at/userfiles/file/26781878503.pdf In PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/6b312034c7618376de0fa874e5358b7f/gelufotenanenubovoj.pdfIn PDF document text
    • http://vinmexindia.com/uploads/88849197143.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccb51d1e28---61053769292.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16093b006c107c---sivesovaderumozu.pdfIn PDF document text
    • http://studiosiriosrl.it/userfiles/files/tugazekedozilewalimazog.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/2c4e83f9864e9637339db1dbed2ab84a/jaxotu.pdfIn PDF document text
    • http://forspeed.cz/ckfinder/userfiles/files/90780026280.pdfIn PDF document text
    • http://ud2-140.com/files/29561209011.pdfIn PDF document text
    • http://faradbox.pl/files/file/wimibozewipelej.pdfIn PDF document text
    • http://portableandcool.com/files/files/gokurenedaneguwa.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/d1044f12d49eed858fe32ce2aee907fc/fitageza.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/83163025ee8823bfaa57fdf0e4651dca/nadukodid.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/f9e958376187597d03ff1fb7ff275137/vofabuvub.pdfIn PDF document text
    • http://pvvc.cz/files/wajafoki.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/cpq4sj8shjq0oir4oknoiffb9f/98612279786.pdfIn PDF document text
    • http://parentini.it/userfiles/files/wojidanar.pdfIn PDF document text
    • https://digireg.dk/upload/pudumodetibimemoze.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/2oljs3v7m645263r4bjkv76pps/90360593845.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/87482635545.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/10972076888.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=broken+vessels+violin+sheet+music+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEFC 17180 bytes
SHA-256: b95fb2cd8918dd73d240e7de7373140e1138c40c5239ae72698a6b91a4723203
font_01_sfnt_off0000da9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B2 11036 bytes
SHA-256: 082d3a7a7cb54df26061c550498cbd3fc510e5452f363e7bf0f7fa214f17130a

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