Malicious PDF — malware analysis report

Static analysis result for SHA-256 897ccd14d63eb914…

MALICIOUS

PDF

78.1 KB Created: 2021-09-18 20:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0982e9dfcca2008414eda39f651b4037 SHA-1: f4cd6a4a7ccb14481a871d6fd55e9477a9c7a228 SHA-256: 897ccd14d63eb9140c484c37615ce46eecb56f04b0c0ecdf7dd4386e62b753e3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains numerous external URIs pointing to various domains, suggesting it acts as a link farm or redirector to malicious content. The presence of embedded URLs and the overall structure, despite the lack of readable document body text, strongly suggest a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 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://medvor.ru/uplcv?utm_term=jungle+cruise+movie+release+date PDF link annotation
    • https://tasteadmin.com/ckfinder/core/connector/php/custom/wysi_uploads/files/81050233386.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210913130510_wlkx7d.pdfIn PDF document text
    • https://inprovitcentroamerica.com/ckfinder/userfiles/files/86130601603.pdfIn PDF document text
    • http://khangvietdn.com/uploads/file/ralotilemuzikinazumapivis.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/fukexaxowuvixiwonexog.pdfIn PDF document text
    • https://talenthunt.biz/userfiles/file/mimifenujavet.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/18074158403.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e36a69b24---lapukogepubix.pdfIn PDF document text
    • http://srtcivilnorth.com/ckeditor_file/files/liwomekagiguwapexuzawoba.pdfIn PDF document text
    • https://ubitanduk.com/contents/files/8345395812.pdfIn PDF document text
    • https://ritascreation.com/userfiles/file/17539327437.pdfIn PDF document text
    • http://gibisch.org/files/files/torikixajuwawex.pdfIn PDF document text
    • https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/19103807720.pdfIn PDF document text
    • https://www.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/relijaj.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/96511256977.pdfIn PDF document text
    • http://quesnelbusinessnetwork.ca/userfiles/file/78556963683.pdfIn PDF document text
    • https://yuktogel.com/contents/files/buxefifelufi.pdfIn PDF document text
    • http://realfootball.gr/userfiles/file/34931833503.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/mawamamukenogo.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/5185681703.pdfIn PDF document text
    • http://mobilenmr.com/files/files/38853642574.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/23752420824.pdfIn PDF document text
    • https://khmernative-rice.com/userfiles/file/27333714225.pdfIn PDF document text
    • http://huarui-bio.com/upload/files/belemiwofulunobewijezake.pdfIn PDF document text
    • https://agmatbaa.com/upload/files/35427503166.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://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_off0000c813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC813 18940 bytes
SHA-256: f0ec29a8914e39128dc9a0107fbac53a68800bbb2f5049ea4cf3f30b69e36684
font_01_sfnt_off0000f9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EA 10872 bytes
SHA-256: 9455463752f015ba0ab504c2eb09b1798877a75e3e7fff1d3c707e90e0385ee5

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