Malicious PDF — malware analysis report

Static analysis result for SHA-256 94cc6289e43edb1b…

MALICIOUS

PDF

121.0 KB Created: 2021-09-01 09:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a67f461fd77b3e659cbba5eb30950645 SHA-1: 394f08b0229da50f34aa3969e5fd92e4adbe4558 SHA-256: 94cc6289e43edb1b67391e25ca6ac07e57e0b79107cf2f37000036ec069ad2ad
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories and disposable hosting domains, likely serving as a distribution point for further malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the true destination and potentially leverage SEO tactics for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

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://studiofantino.it/userfiles/files/wajoranoxeleweduzimen.pdf In PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070633d19cfe---jorib.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/kelufofose.pdfIn PDF document text
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/20817531833.pdfIn PDF document text
    • http://artospace.com/pics/file/82090430257.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/nugefovudiwagiwejubet.pdfIn PDF document text
    • http://mamam.by/upload/File/file/bubajireloliwisex.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/66788643608.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/cf1b3f0852865415f63262e904b818ec/10766176280.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/wigum.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/labufukudipone.pdfIn PDF document text
    • http://zae.me/datafiles/file/34761791109.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160faf9e27999b---92055098016.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946170e0c3d---42510760734.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/40633512127.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a790ad5c88---59666134962.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bec1d20ca---wuxovovexofise.pdfIn PDF document text
    • https://maturana.cl/upload/file/nufebipumelogonelirep.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43185282943.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b386c3a194---76688733244.pdfIn PDF document text
    • http://leebyunghun.kr/new/upload/board/files/77213826457.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202108280458279198.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/94613809754.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=poison+every+rose+has+its+thorn+tabPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000168ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18116 10480 bytes
SHA-256: 60fdeeccab96ea6cbb864fe794500848224ea83a75d4d04eb6ae53654da32528
font_02_sfnt_off000198e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198E8 19328 bytes
SHA-256: 829896ff770bd0c4cf8b463735562e146860e471983c3bb0f2d2826da2cdd544
font_03_sfnt_off0001cbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBCF 1796 bytes
SHA-256: 81772548e4851094fee969ccb605bade1f59cc98c6e4a1aee32f7d0bb99bd99c

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