Malicious PDF — malware analysis report

Static analysis result for SHA-256 17eeaea8a44af933…

MALICIOUS

PDF

75.3 KB Created: 2021-09-11 06:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cbaab49d610edb6b1272f9ca8122122e SHA-1: 1805547128260cbccc13c965074a79c6d53883c3 SHA-256: 17eeaea8a44af933817da2a80e7463be50fa66dc02680a19d6ea7222a5e8ad9a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded links are indicative of a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/45340c310c8425fb84afbf45e58b7e00/43984475577.pdf In PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/64768384824.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/5e6354246f600ed17610e5836abef047/wexalisipedojejefazomomi.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/2277470821.pdfIn PDF document text
    • http://abwbaltimore.com/uploads/files/tiniwomuruwejad.pdfIn PDF document text
    • https://thaibamboorestaurant.ca/phpsites/bard_ford/uploads/file/41988904168.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c3ef8d06b---24807443241.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16133969925745---bewurebikafiz.pdfIn PDF document text
    • https://excellencetogether.com/img/files/file/bozuxipivepenarozux.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/55160254756.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c10c958abb---pipuxilidibusumilimamifes.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/puvawulexes.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/depokudajajefizuwateno.pdfIn PDF document text
    • http://www.satunatc.ac.th/ckfinder/userfiles/files/94784038078.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133296b77bd3---jatafewejogowogajemadeso.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/81587458170.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/nufofiverelavepovixuvi.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/74338055714.pdfIn PDF document text
    • http://ks-system.co.uk/ckfinder/userfiles/files/29207111480.pdfIn PDF document text
    • https://hotlinepro.in/admin/userfiles/file/nodofapiwozakeji.pdfIn PDF document text
    • http://tivati.com/uploads/userfiles/file/jiberijalevinalivugufe.pdfIn PDF document text
    • http://hightopeducation.com/cms_uploaded/file/memizisufokunedukewelug.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/9695087278.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=catching+fire+watch+freePDF 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_off0000c26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC26A 10400 bytes
SHA-256: 6b64d706321edbf4ac296cd8d9a1abda324ef6e0ecf4095e6af037cdc61e168e
font_01_sfnt_off0000d9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FE 17568 bytes
SHA-256: e29331a4799807663ff891bd3f28ef428a6c4c4c07e40609e5cb5afba6c560f0
font_02_sfnt_off00010785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10785 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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