Malicious PDF — malware analysis report

Static analysis result for SHA-256 18aeca92960395e5…

MALICIOUS

PDF

76.0 KB Created: 2022-04-07 11:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-10
MD5: 415cb1c4b61e5f7762fb0f3f42ff3aaa SHA-1: e76501b2421354d1d3d5af5e17c835af34667107 SHA-256: 18aeca92960395e50ba7bde511552dccaf3e8c77c3e15b1636acce8a11d3ec09
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many hosted on disposable domains, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for SEO manipulation or to distribute further malware. The primary attack pattern observed is the use of malicious links to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • 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=free%20printable%20hindi%20worksheets%20for%20kindergarten%20pdf PDF link annotation
    • https://tepidupelagoxu.weebly.com/uploads/1/3/4/4/134472529/300660.pdfIn PDF document text
    • https://fadegoke.weebly.com/uploads/1/3/5/9/135990174/fojuna-wabuno-sorezar-mezuliten.pdfIn PDF document text
    • https://puwijupuf.weebly.com/uploads/1/3/4/7/134701632/bojadamuzovupojav.pdfIn PDF document text
    • https://livekojumezo.weebly.com/uploads/1/3/4/3/134384671/xalusetaxeritup.pdfIn PDF document text
    • https://xagapetudiza.weebly.com/uploads/1/3/4/6/134686513/dekiz.pdfIn PDF document text
    • http://www.littlebookofjohn.com/kcfinder/upload/files/46356066645.pdfIn PDF document text
    • http://www.auberdiffusion.com/ckeditor/kcfinder/upload/files/jizevakupekaraxojitipa.pdfIn PDF document text
    • https://fovivijidilel.weebly.com/uploads/1/3/4/8/134888041/9334ad5c93d8.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/puxawatitigosaxomufike.pdfIn PDF document text
    • https://voligamaxe.weebly.com/uploads/1/3/4/5/134512074/1428847.pdfIn PDF document text
    • https://sosalikibagog.weebly.com/uploads/1/3/4/8/134856993/a46b9f8252a9.pdfIn PDF document text
    • https://lokugejepotag.weebly.com/uploads/1/3/4/3/134318746/pupetutab_tijufubovi_mepalodeke_sigamuvoxobet.pdfIn PDF document text
    • https://trungtammaychieu.com/ad-min/js/libs/kcfinder/upload/files/gifejujidige.pdfIn PDF document text
    • http://3dsami.org/uploadfilefiles/gexonebosagewer.pdfIn PDF document text
    • https://zipawigulugug.weebly.com/uploads/1/3/4/9/134902713/mijixutodip_nuruluwakalud_degojumipujale_resotedakodej.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1623298aa494ea---mudafu.pdfIn PDF document text
    • https://lanekuloriko.weebly.com/uploads/1/3/0/8/130874063/8058243.pdfIn PDF document text
    • https://www.coltishallclinic.co.uk/dashboard/ckeditor/kcfinder/upload/files/zugumojoweviv.pdfIn PDF document text
    • http://rld-carbon.ru/file/jonis.pdfIn PDF document text
    • https://adporly.emailingmanager.com/uploads/editor/file/27960914784.pdfIn PDF document text
    • http://asliev.coco1490.com/upload/file_folder/file/selizuzanerogodopuzesa.pdfIn PDF document text
    • http://korio-olsztyn.pl/userfiles/file/viriwizimefikov.pdfIn PDF document text
    • https://wefopizek.weebly.com/uploads/1/3/4/8/134849363/tutelexerotomola.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/gomavipozetilemumix.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 extracted file (font_00_sfnt_off0000c2a1.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000c2a1.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A1 16800 bytes
SHA-256: abdd04f92067202e74d177b49249519c8568a5920c6d2d7fc0efbdd026eb2243
font_01_sfnt_off0000ee65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001067c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067C 11072 bytes
SHA-256: 620867f2f6bdf12c90031303d8ba083d8e13fb9f4ca8e1a37e19deb5f5ae24ff