Malicious PDF — malware analysis report

Static analysis result for SHA-256 9413ae00fd705517…

MALICIOUS

PDF

73.2 KB Created: 2022-05-15 19:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 44135e71ef7a01d5e8dee22cfa4c5da8 SHA-1: 6511cd04c48bfe7424b3a1c7d25559c816dd9817 SHA-256: 9413ae00fd7055177ad40e5a1429f722110d19eed0ee1359b2b08b0d4e0332ce
216 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous external URLs pointing to compromised CMS uploads and disposable hosting. These links likely lead to further malicious content or phishing pages, aiming to exploit users who click them.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://wirut.co.za/YmrXLWy8?keyword=order%20of%20operations%20with%20fractions%20worksheet%20kuta%202%20step PDF link annotation
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/5d520683f0c5984ae0ad9a8c74f25ea1/ravanij.pdfIn PDF document text
    • https://sobaxijuxoje.weebly.com/uploads/1/3/4/2/134235367/ginariwari.pdfIn PDF document text
    • https://nevidabaxava.weebly.com/uploads/1/3/0/7/130775666/pamesewa-girasijox.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/46717386060.pdfIn PDF document text
    • https://xibupofuku.weebly.com/uploads/1/3/5/3/135306475/jexokezowojotip_bajozemama_kawafiruzuzarod_nezubavi.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1626d319e9ad13---98819695754.pdfIn PDF document text
    • https://fodupuvavukef.weebly.com/uploads/1/4/1/7/141791614/5785440.pdfIn PDF document text
    • https://kuwevezutasozif.weebly.com/uploads/1/3/0/9/130969868/depojuraxivegep.pdfIn PDF document text
    • https://kidenido.weebly.com/uploads/1/3/1/6/131636891/wexefonosi-xebuwazenux-gokedem-kubokiv.pdfIn PDF document text
    • https://xetiwokew.weebly.com/uploads/1/3/4/7/134741649/2153725.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/61893123667.pdfIn PDF document text
    • https://xaperosojemi.weebly.com/uploads/1/3/0/9/130969510/fagudodivuk_titite_kodiz_pizubukizubovof.pdfIn PDF document text
    • https://zetitazafoxiz.weebly.com/uploads/1/3/4/0/134040412/zurelutoxawamuzavawu.pdfIn PDF document text
    • http://shopcloud.cloud/ckfinder/userfiles/files/xutozivodidamofulo.pdfIn PDF document text
    • https://ramageputa.weebly.com/uploads/1/3/1/6/131637054/tusujud.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/kiniwelike.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1623afa228ac0d---29111645194.pdfIn PDF document text
    • https://bekekomigeb.weebly.com/uploads/1/3/7/5/137505653/1949909.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/faleferemiminitabe.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_off0000b540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB540 11096 bytes
SHA-256: a0dbc9b190e24c5b70eec0ffc7f710a4e39fa7ff9e01dc1ac38d838e72a1526b
font_01_sfnt_off0000cf2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73F 17780 bytes
SHA-256: 8f126060add8c5b853f398b0458cd3d94871492bd6e6c0888a3ca15ed17c3afb

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