Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05b0a93b8c16d74…

MALICIOUS

PDF

136.0 KB Created: 2021-06-30 23:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 29d7b4db76c8bca727174249626e31e3 SHA-1: 60d65ae038224d0932ac9b9c19559e031ba54e49 SHA-256: f05b0a93b8c16d74a59a6a0b7e3a3486893cff6f3ad3118d368fb8c38ceee2f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, likely intended to lure users into downloading further malicious content or providing sensitive information. The ML classifier also strongly indicated maliciousness, supporting the phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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=russell+westbrook+washington+wizards PDF link annotation
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160862e6867648---18033986030.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/60140370314.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/c268e6f523a70b4c2e433ff967074b7b/86290064934.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/f3a7813d44819f290c1aa159abc77c72/dovegomuzukilus.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5da14ed6c---rapoxunupatetamexuzoxit.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021060110461880554.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b34a3cac946---84505824970.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9dcbf5e2a7---misazovibaruwavipakubizuk.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/75d179dced9337be15ac40e4d1615858/kebamob.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/320a4d1ac407645cb205b24ad9e41b8d/84318005509.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3289256258---tibeserukizodizi.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1606f32541f4e3---48054879882.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/28610648335.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6669c9174---poloziwiveberekaweguzupe.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbfa83623d---dogikalexovibo.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/d361a8993b8a45e4a1cbdf195e07cf28/lelamedefinowusuteda.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160812441745d2---makubibisemugozolosak.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cf6d45f0c---sujuvitojina.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/61a2cd50c4a026867177523a86c5c6a8/riwometuxozizemoxi.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084e428d08ea---vezozevepitamokowove.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1a964108b---6725442249.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/dtscmojrd2tcr2jpva87at0dv4/pemukozafafatavez.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/n4rh5a2oln5opci9b0e3k78455/fakavimu.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ee4af2afb---81751475842.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_off0001af95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF95 18396 bytes
SHA-256: c3d38584b2c3e931cd4c976538029b40aaccc568ce0c01c9de3d544b7d532ade
font_01_sfnt_off0001e042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E042 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001f859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F859 11052 bytes
SHA-256: 744596fa0ba47303b0ea0d47d26d71d7872ef0f98197826a0ca1100990800317

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