Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2f20463155556e…

MALICIOUS

PDF

80.3 KB Created: 2021-09-09 08:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f6f5b9aa916d8bfc10eeb4d5a4d12dd1 SHA-1: a32782b8da9c8adb52e2c792837283919acf23af SHA-256: 0f2f20463155556e40dc4f2ecd39b4c5bbe3578b03a9f7752e73f9bed4cd8aa4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple external URIs and link farm heuristics suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://an-ocn.ru/ckfinder/userfiles/files/4535023092.pdf In PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/kerolaxulafebusit.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/lemekozujepusolipixokadev.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/78241026846.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161354bca4835b---liripaxu.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/samanun.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/tupofuroruxer.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/a07e7f5e9d66731d39ba9afecf3ddd4a/31072246690.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/baduxavixojekosafogu.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e28d41e06---samabud.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/28230383894.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/dajalimunasikomoganif.pdfIn PDF document text
    • http://maychaybocaocap.com/app/webroot/uploads/files/falitowoxuwoza.pdfIn PDF document text
    • https://www.corpeverest.com/ckfinder/userfiles/files/marufeworazofatil.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/1d2ff68aebd2fedd2bd06d00f6234aa1/92865269868.pdfIn PDF document text
    • https://xn--z4qq44i.tw/upload/actfiles/60384905376.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/10257289043.pdfIn PDF document text
    • https://thaibamboorestaurant.ca/phpsites/bard_ford/uploads/file/sepijaj.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/xajepuselipimud.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/4d902a31e6f72c946161ed3cf017a4da/fetewiseninoles.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312f477e960---66673047572.pdfIn PDF document text
    • http://tahyuh.com/uploads/files/202109040718334082.pdfIn PDF document text
    • https://superpackeg.com/userfiles/file/91958358585.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/raxetaziliselunudigi.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/93693640869.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=mi+tv+stick+updatePDF link annotation
    • 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_off0000d6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EC 17536 bytes
SHA-256: f3f8ad292c1bf39aef0886ab3a7a5cefff575f9520689b71880a65e5198577f3
font_01_sfnt_off00010411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10411 10388 bytes
SHA-256: ef527d5500ed7aafb6c0f6d6fa33676ef9952488ff475212df953872c459ccfb
font_02_sfnt_off00011bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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