Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3eaf69d194f178…

MALICIOUS

PDF

85.4 KB Created: 2021-07-13 16:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6f75fe1e0bd2c451ede40ecc94cbb22e SHA-1: cb940c3257e1199a9ad4874ef5a7a3577c0cd465 SHA-256: 0e3eaf69d194f1787d2ed926ff922470d182bb1b128234ec3b2f6698c4f1eaad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to lure users into phishing scams or download further malware. The document body is heavily obfuscated and unreadable, providing no direct textual clues, but the presence of many external links strongly suggests a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://cloverpark1960.com/clients/1/17/17c242f0968dc4bce059666b43fbd075/File/78517379100.pdf In PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/7e6eb55ff584fd1facf23d5bcc2c4322/91711485204.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/87000273859.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e9cf730ec---goxapoxalarozevig.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4f5d5c67a---99724654921.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/94f935d488dda162d564590477bc2d32/94805910683.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/979d3d8eb5dc8d54873f30c4aea62ad6/vuwagufu.pdfIn PDF document text
    • http://cafehinglung.com/uploads/files/fenudugunudutaro.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7af31bb111---71744542248.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072707d6dbc1---gofufuvogobikemu.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/29190439699.pdfIn PDF document text
    • http://bluefield1966.com/clients/26642/File/duxivaxuvosuzozup.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3b76bdf3b---40966251879.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/vofj12060rf3b7qo6gimuk5i6k/17385916360.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/4k5c6mvg2ai602ol0ih1blek6b/46956623323.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/duzolixiwivuzikugusufanap.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e6a8785f6---lifujumavatinewegixepiwib.pdfIn PDF document text
    • http://hillandbrownfamily.com/clients/76964/File/kizibelogaxabebug.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ad7b0daef---naruwerilavupuge.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/kll1q6er9hccjqlb8sbhtufg7f/wolipagebu.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607333422e206---sogexepubemugegodi.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/lanijotefage.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/39375060115.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=federal+tax+withheld+meaningPDF 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_off0000ed4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4F 10572 bytes
SHA-256: cb4856126f23b9eb12c34e142bf37f163a593c85bdecfcaec8a8a666db34e7ea
font_01_sfnt_off00010506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10506 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D18 16720 bytes
SHA-256: 56fcab1ca5acba3fe568f4b81ddcd675f6786d0375a1bf219a3787b3bceddf6e

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