Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a34f6067e326cea…

MALICIOUS

PDF

84.0 KB Created: 2021-07-18 00:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 91874896dda3b4afa4fbea8f411f530e SHA-1: dedfa65c8f2bfc036a40a0608ef1880c37cfc038 SHA-256: 0a34f6067e326cea9d278a59ec23f1d883b6573ebb266bd2db4ac7bf45e2abca
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that point to compromised CMS uploads and disposable hosting. These links likely serve to redirect users to malicious sites for further exploitation.

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://aucoindeshalles.fr/menu/file/sabudaju.pdf In PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/09jr5p7ohv07cus22hhp407hg4/77059805166.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/vogubisolol.pdfIn PDF document text
    • http://sanmargholidays.com/ckfinder/userfiles/files/4046658706.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/a54uiliekvv0s84sptmnlvobf9/86770307776.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb0a3d9353---bobolimixazetebim.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/a59f0594e3b7e710f19eb3e15151d035/1749577930.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/9c60b99f08fd73a095adcf56a44ed590/fukubafumusanix.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/xevisoxulepezereruno.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf16ae13a20---74098187713.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160983220c62fe---vubasuseriwebetisadunigud.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/96765072363.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/fopotote.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607960b8dea17---56391651962.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/susagubobiriwivoma.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/df03675610a4fb84b678c562f6079394/tokori.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/39232946264.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/nevobewoparifivina.pdfIn PDF document text
    • https://pmms-online.com/assets/file/56354971845.pdfIn PDF document text
    • http://yuha.be/_files/file/58739727348.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/766124c7697e63c23d36b2ff1b853457/17617524111.pdfIn PDF document text
    • http://blueyee.com/upload/file/102305271523.pdfIn PDF document text
    • http://jimigubellifoundation.org/clients/f/f9/f96c94eea877db95ad0a8b6fd709b1ed/File/71613138105.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=west+4100+controller+manualPDF 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_off0000e118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE118 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92A 18388 bytes
SHA-256: 10caddbbbbcf75a1e0a49efeb372870be51a4b244c27059c6251318c614ecd1b
font_02_sfnt_off0001289d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289D 10644 bytes
SHA-256: 553547b1aabfae017af9be553ca81ce4ca74def91bc424a85ee66bb5ae3b4ea1

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