Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9b7330224b7c2c…

MALICIOUS

PDF

74.3 KB Created: 2021-09-03 04:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 75e52116890db5fec7ec57d4f41c4baa SHA-1: 097b015f8d3d52d7300c340c368b23209c7bf59f SHA-256: 7f9b7330224b7c2c50e6cbd2401287a265d045eddb51652f06c0dbe3b5001b66
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://smidgel.ru/uplcv?utm_term=salmonellosis+journal+pdf PDF link annotation
    • https://daismene.it/file/71918751086.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/49274477753.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b70ee3aa021---21939374009.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acaf175aef5---59248406307.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/10740311771.pdfIn PDF document text
    • https://2acontractor.it/images/file/1473253563.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/35824034558.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/8t0jn0sv4ff4eltcn3007g8rdf/lenaguxaxidiminubekusiwiv.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0a6d0b32d---97876391570.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/74079579075.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/64215280514.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/fujawidedibudunebudatoku.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/nexaf.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfd9000a3da---11000711865.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/wevefakuvimerawevalakuvim.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/fc2bc38dc381536c0cc74407a0659e4a/63970002480.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/vuxuweniwapoxilefi.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/89518713628.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/1gs500hvms9kagqqsg2lbpffvj/mozuvuwodine.pdfIn PDF document text
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/6786d18414a087b39c97a0189c0701ef/41246771651.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cc3379473---31290904993.pdfIn PDF document text
    • http://toyotarenta.net/FileData/ckfinder/files/20210704_228D0A2FC5AE8470.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xogurakiwij.pdfIn PDF document text
    • 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_off0000beaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BC 16860 bytes
SHA-256: 83f25177bef165dc16c1ed6b7a7dfcf747f9c6b0482f0361a7cb07840291149e
font_02_sfnt_off00010282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10282 10864 bytes
SHA-256: 9493437292a424738d9b7ba85b7d4b9f4d19e1cadfc1d145cc84c9d4d45aedf1

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