Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c005317efa35bf…

MALICIOUS

PDF

86.2 KB Created: 2021-09-24 07:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d65e50ac2983cd71d1f4ea39cbe2e1eb SHA-1: 9ef5efb27308bb3beb67b6353225ef50b8f605bd SHA-256: e1c005317efa35bf05471513099757123adf3b78debe1b5d5b2187d4fdd56b7d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. The file contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, suggesting it functions as a link farm. The presence of external URI heuristics and the ML_NYX_PDF_MALICIOUS firing strongly support a malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://nomylo.ru/uplcv?utm_term=how+to+transfer+mi+fit+data+to+another+phone PDF link annotation
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613005f2ed39f---dorabuj.pdfIn PDF document text
    • http://rubella2.integra-sh.com/userfiles/file/nazefe.pdfIn PDF document text
    • https://atvatextile.com/upload/ckfinder/files/48373153415.pdfIn PDF document text
    • https://cnc-ar.ro/files/file/pexabewobezag.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16145366b88d39---mizekeropol.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/defurenimufi.pdfIn PDF document text
    • http://style4.allwebeasy.com/userfiles/files/nesoferuzunoxuveg.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141c6765a5d7---9626127035.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/tabuvexazopal.pdfIn PDF document text
    • http://scro.ru/pic/file/kiruzovolusanonuwibevoza.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/bokemomubumeresow.pdfIn PDF document text
    • http://frankifoto.com/uploads/pages/files/nokujusewufowijurodesukop.pdfIn PDF document text
    • http://koddous.com/userfiles/file/59272052707.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/23446518151.pdfIn PDF document text
    • https://www.bussmann-tiefbau.de/ckfinder/userfiles/files/reboloboj.pdfIn PDF document text
    • http://dienmaythanglong.org/uploads/files/vofunumadob.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff8fb4b73e---1589288060.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/besimetujezawi.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/161497f64c1f78---49476394537.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/suxolo.pdfIn PDF document text
    • http://elitk.ru/_files/72424069500.pdfIn PDF document text
    • https://questfran.com/broker-site/files/files/40051410320.pdfIn PDF document text
    • http://www.reeder.ee/files/filemanager/lexigebuzimupotaferawuxe.pdfIn PDF document text
    • https://kampusogrenciyurdu.com/file/fenugo.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_off0000e7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D7 19168 bytes
SHA-256: a830824e31f1d203ab4cf717a9b35dd80b7b373141f4624507f3b521840bbc2a
font_01_sfnt_off00011a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13257 10792 bytes
SHA-256: 25f35e71deebf92a5653567643c724dd2865decbc850b29a8741efe3a9894230

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