Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d69e0d5e75cb26d…

MALICIOUS

PDF

74.2 KB Created: 2021-09-07 15:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e5dfae258189565095bb2660cb468382 SHA-1: 0e2d46dd17e6b9a6f7795592e98ee3275f8c42e7 SHA-256: 6d69e0d5e75cb26d6d122e0e414dbb0e38ad7c478b6817335a7594bc48a4ced3
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of multiple external URI heuristics and link farm indicators reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://alutat.com/data/file/37577164676.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160abde433c6f8---joket.pdf
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1625768381_49aef5e26a.pdf
    • https://imaggu.com/ci/userfiles/files/bijinodexox.pdf
    • http://022-web.cn/uploadfile/file/20210816110802322.pdf
    • http://a-swiss.com/upload/userfiles/file/majefuvalirevonijo.pdf
    • https://majorsagilekvaros.hu/uploads/file/29736917481.pdf
    • http://www.agenbenangbandung.net/file/55047297657.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/54d8962cb4dfde2a79748dc0eea990d3/10264299254.pdf
    • http://iamsong.vn/uploads/files/wubopivugazojemetetodux.pdf
    • http://rowsontw.com/shopadmin/upload/files/sadelomamamijatulubalifu.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16076d88325828---86142763886.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16123603e6064d---55084140585.pdf
    • http://newtrierreunion1962.com/clients/6/64/64567561842b0bbd40b956adda0282a7/File/98489761216.pdf
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/bodowemebas.pdf
    • http://nesemlak.com/test/images/uploads/files/rizewuzimu.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/3cd6368be663fbc324e801bc4479e5af/nerul.pdf
    • https://www.bevillelecomte.ovh/ckfinder/userfiles/files/46129141846.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a775061eefd---wawaguzixabinonom.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0637e823b---31494301738.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8df0c1f26---20444352368.pdf
    • https://filetorme.com/upload/files/nikonumubezilagediwez.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=personal+interview+definition+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf93.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF93 16792 bytes
font_01_sfnt_off0000d7aa.bin
8da20abbcbd71f88817d0399995e8a856156a6304892bbee3434c6f8e579fda5
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AA 10644 bytes
font_02_sfnt_off0000f036.bin
f2606a0852269cbbaf8697178ac91e53a41371fd48d526cf0b3d4e2e3170cd0e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF036 16708 bytes