Malicious PDF — malware analysis report

Static analysis result for SHA-256 3638db604f2273c0…

MALICIOUS

PDF

82.6 KB Created: 2021-01-31 01:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: d3cb4bf227decc0023c23d0f0f39e536 SHA-1: 3e617b093f3af37c4acc823c925321304f6b55e4 SHA-256: 3638db604f2273c066ed8b5bd20bdabbad522629edb69ecbebe05915707c908b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to disposable domains, which is characteristic of SEO manipulation or a link farm. ClamAV and ML heuristics identify this PDF as malicious, likely a phishing or trojan distribution attempt. The presence of external URIs and a link farm on disposable hosting strongly suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/123?utm_term=pea+beans+or+susan PDF link annotation
    • http://pewodaz.22web.org/54057295572.pdfIn PDF document text
    • https://wugovaxovagebi.weebly.com/uploads/1/3/0/9/130969592/24223f2526e3da.pdfIn PDF document text
    • https://voresefum.weebly.com/uploads/1/3/0/8/130813922/loxezu_peguba.pdfIn PDF document text
    • http://xosijitede.22web.org/behringer_x32_producer_user_manual.pdfIn PDF document text
    • https://nubeboganiroj.weebly.com/uploads/1/3/1/3/131384383/dewowiwel.pdfIn PDF document text
    • https://zakikubefetopu.weebly.com/uploads/1/3/2/6/132696201/muwufumujo.pdfIn PDF document text
    • https://kamukijupekud.weebly.com/uploads/1/3/3/9/133997827/5032859e07f94a3.pdfIn PDF document text
    • https://sukutunog.weebly.com/uploads/1/3/5/3/135304197/rupexubibujulaw_vexukiwawo_wirajatiwudaze_xazite.pdfIn PDF document text
    • https://rarikomedos.weebly.com/uploads/1/3/4/6/134616559/kojina.pdfIn PDF document text
    • http://vukosam.22web.org/android_9_pie_samsung_galaxy_j5_2017.pdfIn PDF document text
    • https://dawekemukodo.weebly.com/uploads/1/3/4/4/134491409/6013018.pdfIn PDF document text
    • https://joxunirefebemi.weebly.com/uploads/1/3/4/3/134319414/xivadareteva.pdfIn PDF document text
    • https://vaxofawaz.weebly.com/uploads/1/3/2/6/132682661/gofaz_xekefebetajub_dalutiwawijogu_janusulozokakef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/nedivanus.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/19606643012.pdfIn PDF document text
    • http://fekamenuzexogam.epizy.com/endless_space_2_invasion_guide.pdfIn PDF document text
    • http://gizadopozi.epizy.com/maa_chintpurni_aarti.pdfIn PDF document text
    • http://jipuzekas.rf.gd/53079837960.pdfIn PDF document text
    • http://bokatamekal.rf.gd/bafofudumemewe.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/13010711591.pdfIn PDF document text
    • http://borinalujid.epizy.com/71653991358.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC4 4788 bytes
SHA-256: 08cf362a535d980e6ed88f2488e8de7c22000eab0735e5c535c16f0fa3eac39f
font_01_sfnt_off00011017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11017 14328 bytes
SHA-256: edd97d2ad57f382e3333bd390884d27b6126f48ffd02232ce1eb3cb2f8733e42

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