Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a85774f958af6e…

MALICIOUS

PDF

90.9 KB Created: 2021-09-18 07:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1ab413aed9e38108a1049458bb12e4c6 SHA-1: 7ff654ebb2afe0b0cd3f6310d74f0107e11c2f47 SHA-256: 03a85774f958af6e5d0668a62774c7438a96e9d7115fc74bcebd2586ad34583e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that form a link farm, directing users to potentially compromised websites or disposable hosting. The presence of external URIs and link farm indicators suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://smidgel.ru/uplcv?utm_term=pokemon+go+rare+candy+hack+2020 PDF link annotation
    • https://gilboamedia.com/userfiles/file/83520134305.pdfIn PDF document text
    • https://sgotomotiv.org/upload/files/winotumo.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131bb88f1825---jesakanaveviware.pdfIn PDF document text
    • https://fiscconsulting.com/userfiles/file/22127498918.pdfIn PDF document text
    • https://schmitz.cz/res/file/73225010719.pdfIn PDF document text
    • http://laconchigliacasevacanze.it/userfiles/files/mimabuzikuvabo.pdfIn PDF document text
    • https://ducthai.vn/userfiles/file/53149528855.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/bidawazabimoriwuzubuxi.pdfIn PDF document text
    • http://customize.fr/fckeditor/editor/filemanager/connectors/php/img/Editor/file/32025518027.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/nejupifomoz.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebe9d5c0a2---40892731937.pdfIn PDF document text
    • http://michellenevinracing.com/FCKeditor/file/pegelil.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/dijofoxirep.pdfIn PDF document text
    • https://aqua2go.pl/galeria/file/2333500276.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/4f538232189af6a1792abf768d9180b6/27143780130.pdfIn PDF document text
    • http://candientuvibra.com/images/file/32657075865.pdfIn PDF document text
    • http://aviafond.ru/userfiles/file/vulokowatokufavalodis.pdfIn PDF document text
    • http://realestatespoznan.com/uploads/lemijewekumixixusuwelep.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/64743949806.pdfIn PDF document text
    • http://rcot.by/pics/files/zuvipuzebuxit.pdfIn PDF document text
    • https://rumahbaruku.com/contents/files/meziwosevu.pdfIn PDF document text
    • https://emtracing.net/userfiles/file/72390591242.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/637006c904fb6888b441d2836eaa4e23/gowoves.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5dc449a61---tiduxu.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/movonadopufijen.pdfIn PDF document text
    • https://bimore.vn/webroot/img/files/62666128255.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_off0000fc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2C 10860 bytes
SHA-256: 5daa98003b05e56ea6d16409c6bbca59d94e072ad6d6037b624f4138473c339e
font_01_sfnt_off000114ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114EA 18252 bytes
SHA-256: b7e542325d1198b6153f9ef16977d4f52659aea24f62f6339c24d98628e5ed50
font_02_sfnt_off0001442d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1442D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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