Malicious PDF — malware analysis report

Static analysis result for SHA-256 3293ac3e60e97614…

MALICIOUS

PDF

66.9 KB Created: 2021-06-18 09:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 94561966065a3eb65736ec45d621933d SHA-1: 4ba34f2c49dd5b47b9e87ec1ea21e96269a2ff94 SHA-256: 3293ac3e60e97614d1ebc3398c02c59a646244307d45575614d235ae61b601bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, directing users to download files from compromised websites, disguised as a free software download. The presence of multiple links to disposable hosting and compromised CMS upload storage further supports its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://avigailpekelman.com/sites/default/files/file/wutovofowawilobuwutifora.pdf In PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1ee906118---ribaxezem.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c350ddac42c---dogugud.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b7e1a65a9---zowesi.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/3c4baa991fe68fce037874708e6e5863/90251140450.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7853dac18---70605245659.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fobvqgjva80qevr0f481b9fib1/86380042140.pdfIn PDF document text
    • http://fields-on-earth.com/sexibegefozififasewapuva.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/xupexozujiwinebavozojik.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/otpsmoc8otf6blqtaja6t3at9h/31416347855.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/tidewag.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/xukimoxisuvaloj.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160856b3dbb505---ruderevudujiduxexalew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=discovering+statistics+using+r+pdf+free+downloadPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC679 5472 bytes
SHA-256: a895cc2c44419fd167fcb5396b1616eec13f8d95cf73ddfae88b664b9e763e36
font_01_sfnt_off0000d948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD948 10468 bytes
SHA-256: e5c8554f656ffc39f904ef72c73f3deaa87ffe0b5b7355832dbdef745f8c3c85

Open this report in the interactive analyzer, or submit your own file for analysis.