Malicious PDF — malware analysis report

Static analysis result for SHA-256 7db118ad78245308…

MALICIOUS

PDF

84.2 KB Created: 2021-02-24 21:09:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 350b6adabb524b2e637a621424dd9470 SHA-1: fdbe27d84ab3256e78c1b67ac17d5d94dfcfda6f SHA-256: 7db118ad782453084b87d7c86dd9be9b7082a80ce70ca13076e69df39ebb84f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many of which are part of a link farm designed to appear as legitimate content. The primary URL, 'https://leonvi.ru/award?keyword=nih+research+grant+proposal+template', is presented as a research grant proposal template, likely as a lure for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/award?keyword=nih+research+grant+proposal+template PDF link annotation
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/2cfc9.pdfIn PDF document text
    • https://kiruxujekan.weebly.com/uploads/1/3/2/7/132740547/rigetanuta.pdfIn PDF document text
    • https://zibubelufi.weebly.com/uploads/1/3/4/5/134517595/jogeti.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/puguronad.pdfIn PDF document text
    • https://lipijunozawisek.weebly.com/uploads/1/3/4/7/134721324/3163068.pdfIn PDF document text
    • https://mixuzurul.weebly.com/uploads/1/3/2/3/132303374/dujete.pdfIn PDF document text
    • https://ribarifi.weebly.com/uploads/1/3/4/2/134266405/e08782eb.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/1547653.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/99281944881.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/99500474902.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/webat.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/fesusi.pdfIn PDF document text
    • http://kukosuluwab.rf.gd/dozuwojexifamojo.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/why_is_my_canon_mx922_printing_blank_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/free_bootstrap_templates_responsive.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/payment_agreement_template.pdfIn PDF document text
    • http://pixoriwabivonol.rf.gd/incautious_crossword_answer.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D54 5316 bytes
SHA-256: e2de9004dbbf86e030a07e23748ec86ab2b95664844f67ca89afde3f4306911b
font_01_sfnt_off00011f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F44 10592 bytes
SHA-256: 85c4be455cf3f3567d7c5f4d1fa4d5ce6ea2ed8b0470f95e302b1d7c697d4d3b

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