Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ee9140b761c61f…

MALICIOUS

PDF

81.3 KB Created: 2021-09-15 21:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: feccd5f3c2935d57882aa40e7813aa68 SHA-1: 0c5a9e3e6dc10c625f6a9f5552cba7d122397aa3 SHA-256: c0ee9140b761c61f336590ff7fe02bf0d2096f27dad51c509467321b39a70854
196 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous embedded URIs were found, including one pointing to a raw IP address and others hosted on compromised CMS uploads, suggesting a phishing or malware distribution scheme. The presence of a QR code lure further supports a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/16630276099.pdf In PDF document text
    • http://huucodatlanh.com/userfiles/file/86275049480.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/97302719138.pdfIn PDF document text
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/15261070392.pdfIn PDF document text
    • http://riasztoszolnok.hu/admin/fck_upload/file/59301652168.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/tetakupivolimo.pdfIn PDF document text
    • https://grafconsulting.pl/Upload/file/26947064614.pdfIn PDF document text
    • http://tomaszfilipczak.pl/userfiles/file/tabuxoxusuvalurug.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/62678299937.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/3671c5ff495449a37b9f8058995185f9/39139576634.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/24773697193.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614115f2991f7---nikolafanixi.pdfIn PDF document text
    • https://tsegypt.com/file/zapofalate.pdfIn PDF document text
    • http://charolais-hessen.de/write/userfiles/file/xunimi.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/zikupanoxulorutezimupazad.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/2946375837.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/82635840858.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/dajafuwiwo.pdfIn PDF document text
    • https://geloracinta.com/contents/files/vubaga.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/68526629195.pdfPDF link annotation
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/47e39e0c5fe9fcf5ad711d7d0dbc2bde/tabifolaz.pdfIn PDF document text
    • http://aqua4you.hu/userfiles/file/sunalufimalefalofo.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/diwepidawevot.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/demoporaletedojizoke.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/nixexapo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=android+car+stereo+themePDF 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_off0000d96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96D 10568 bytes
SHA-256: e3f208a8b3ee3f3aff0eb4e8ee1d10260512af12a21fb6cedc328d49f806cf9b
font_01_sfnt_off0000f161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF161 17584 bytes
SHA-256: 1cdde35460d143767bf684ab9e0291d382e07e5d561086c36b1d8be939c6bb94
font_02_sfnt_off00011f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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