Malicious PDF — malware analysis report

Static analysis result for SHA-256 4457d8373056d608…

MALICIOUS

PDF

78.9 KB Created: 2022-03-28 06:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: f1c80b96fe4676641e94e8f8570dc69e SHA-1: bcdbe1db7f5019422cb3950f2263e2d07db6b7ec SHA-256: 4457d8373056d608071294a9cf3bf51b92b5bae4b0a5f32f28a5a61df76f00b3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed for SEO manipulation or to distribute further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the numerous external URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://cafij.co.za/YmrXLWy8?keyword=kagan%20cooperative%20learning%20structures%20minibook PDF link annotation
    • https://dibevoxatatot.weebly.com/uploads/1/3/1/1/131164568/juvoniler.pdfIn PDF document text
    • https://fofonamid.weebly.com/uploads/1/3/4/8/134869219/veluxedeluzap_rosofopemajim.pdfIn PDF document text
    • https://xabopefasuliwik.weebly.com/uploads/1/3/4/4/134445681/wigun.pdfIn PDF document text
    • https://xirazaju.weebly.com/uploads/1/3/4/8/134859293/c8d04303132e1d.pdfIn PDF document text
    • https://zoziwaxixu.weebly.com/uploads/1/3/5/3/135316133/2a7b8d7def69b11.pdfIn PDF document text
    • https://gujetorepirun.weebly.com/uploads/1/3/4/5/134502828/gaxowoxuzemonig.pdfIn PDF document text
    • https://tagufonatudivar.weebly.com/uploads/1/3/4/6/134609106/8788301.pdfIn PDF document text
    • https://pogugabumivo.weebly.com/uploads/1/3/1/3/131381840/5663325.pdfIn PDF document text
    • https://vafubetuxako.weebly.com/uploads/1/3/4/5/134503762/wajevar.pdfIn PDF document text
    • https://jefabogab.weebly.com/uploads/1/3/1/6/131636769/27aa4.pdfIn PDF document text
    • https://jowatoziji.weebly.com/uploads/1/3/4/8/134893097/9741724.pdfIn PDF document text
    • https://jeputuzomum.weebly.com/uploads/1/3/1/3/131398597/butumelokevajez.pdfIn PDF document text
    • https://jovuximunises.weebly.com/uploads/1/3/0/8/130814448/musuniror-wasajoves-japojuropikonog-tifij.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/3042150.pdfIn PDF document text
    • https://tivofemexire.weebly.com/uploads/1/3/4/0/134012880/8705828.pdfIn PDF document text
    • https://ravemazezaj.weebly.com/uploads/1/3/4/8/134885195/b699163cc2b1cf.pdfIn PDF document text
    • https://wupibivuvofat.weebly.com/uploads/1/3/1/1/131164023/linafelenotawavelilu.pdfIn PDF document text
    • https://jivowewowigopap.weebly.com/uploads/1/3/1/6/131606746/farivipukuweso.pdfIn PDF document text
    • https://sikowegapewabi.weebly.com/uploads/1/3/5/9/135975971/wujojexovoj.pdfIn PDF document text
    • https://tujulita.weebly.com/uploads/1/3/4/6/134687611/votoni-mopetoturir-patub.pdfIn PDF document text
    • https://miwidekufaxojud.weebly.com/uploads/1/3/4/7/134753597/kukisotegemux-kogosa-samibijuke.pdfIn PDF document text
    • https://kidodizaramaba.weebly.com/uploads/1/3/4/0/134096495/dc7a66fc7.pdfIn PDF document text
    • https://fikosaxan.weebly.com/uploads/1/3/4/7/134753192/14f9cac293.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8BE 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off0000cf5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5D 17912 bytes
SHA-256: 815ef5bf75de0bae38c0f0851002add6018915214fc1fa75c9fefcf5d6d150a9
font_02_sfnt_off0000fe5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5D 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_03_sfnt_off000113da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DA 11108 bytes
SHA-256: bff940ad8a8d01bb338d307e757ab5255a366f11d785aa9dbf8ad21ab24b3e7b

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