Malicious PDF — malware analysis report

Static analysis result for SHA-256 e72403a5bff90f3a…

MALICIOUS

PDF

78.3 KB Created: 2021-09-23 07:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 60210aaa691422ac8e54df499b9fe490 SHA-1: 1a2266b30f2dc0d1233a2a4ff0004a050de40aba SHA-256: e72403a5bff90f3a565d597e0fb7c853bfd6b3295ac9d46ff29f7c2d68af96b5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to various domains, some of which are compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The document body is heavily obfuscated and unreadable, providing no further context on its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/21096652895.pdf In PDF document text
    • http://taemyung.com/data/upload/file/46526111945.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/bijugipejubifinufebumeso.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/161319d631c29c---71784998920.pdfIn PDF document text
    • http://bilafafafa.com/shopadmin/upload/files/85945653341.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed292bc986---medefapejemorewuliri.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/betikanujalusekinitoxe.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/97903459326.pdfIn PDF document text
    • http://halaljones.com/uploads/files/96644772835.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/jiketox.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/76764949993.pdfIn PDF document text
    • https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/xexokujax.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ee5ece5f5---kuvenarojiranazopiwoloza.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614860df536b6---68364217776.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/lomutururumokeregibiru.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/52504748004.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/1552846414.pdfIn PDF document text
    • http://pravkniga.ru/files/userfiles/files/woxexofirujivisami.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/58974528402.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/janovuzekeromadazow.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16141c229864bc---muzisiridapex.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bb4687f0ef---xitinutuzese.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=android+webcam+1080pPDF 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_off0000ccb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C3 17692 bytes
SHA-256: ad87277786def49efec010b5ff3e72420570bfdc9b7ce9f0eb78dd96c8d1aae1
font_02_sfnt_off000112ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EA 10952 bytes
SHA-256: 8b8424fc02909ec8bffa494c122be11805efa7c9393ef2d47dd6083c922216ae

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