Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe95208136037e7…

MALICIOUS

PDF

87.9 KB Created: 2021-09-13 11:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d8205b16fe7c28164db36ac6c29121e7 SHA-1: cbe536faa9d5284e7e18cf86e271546455348809 SHA-256: abe95208136037e7aef9654dac28914ad4c3aaa2fb93fb82b4c13d1501fedd7b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or distributing further malware. The presence of external URIs and the link farm heuristic strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://romangruszecki.com/uploaded/file/48942285579.pdf In PDF document text
    • http://sprinter-lab.ru/content/File/64580685628.pdfIn PDF document text
    • http://epoptavky.com/is/images/FCKeditor/File/kodikajilemifujevus.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/fodagofafopiribenaf.pdfIn PDF document text
    • https://thebottombillion.org/business_school/uploads/file/fegirakune.pdfIn PDF document text
    • http://otworz-biuro-podrozy.pl/userfiles/file/17058114943.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/nikadepemufizekowin.pdfIn PDF document text
    • http://yanartextil.com/firma/files/wirolarinimo.pdfIn PDF document text
    • http://an-ocn.ru/ckfinder/userfiles/files/relexuvirivetidi.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/76579547356.pdfIn PDF document text
    • http://bftt.marketsearching.com/upload/files/36223177491.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/mobazosiwugi.pdfIn PDF document text
    • http://keralatravelpath.com/uploads/file/99311200703.pdfIn PDF document text
    • http://kangshi-you.com/uploads/files/202109081801363927.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/j38ukft5at4342og39dftut2fn/78861635392.pdfIn PDF document text
    • http://artospace.com/pics/file/60340103910.pdfIn PDF document text
    • http://veterinariacasettamattei.it/userfiles/files/wixot.pdfIn PDF document text
    • http://canshu.dlzj.net/upload/files/20210913090739162789.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16133fc666220c---nuzokota.pdfIn PDF document text
    • https://arhstroi.by/uploads/files/29614479904.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/25893187831.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=never+have+i+ever+season+2+watch+onlinePDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/zipupabovijivefiginit.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_off0000f3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D7 17660 bytes
SHA-256: 9607b8fc9961cab3c176607468944135801323acf06d19b0c780e585872987fc
font_01_sfnt_off000121f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A08 10576 bytes
SHA-256: cf0aec13b38d789cd5b57673aef661d90c90ce66e14e82f7e1f424b6d8701ae5

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