Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee774f776bed03c7…

MALICIOUS

PDF

156.4 KB Created: 2021-02-22 05:35:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9c8ff3d82d0929e37b98166818b09b5b SHA-1: 11109a14cde632603c375a171ac6f58b7df0d078 SHA-256: ee774f776bed03c7ff9ef17407b00cf3f81b6424b3d8e66477543ae3e1474f1f
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, many hosted on disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • 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 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://seumenha.ru/123?utm_term=logitech+harmony+700+remote+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402252/normal_5fdf00f8f28ad.pdfIn PDF document text
    • http://prod-fruit.space/leet_servers_list02c0u.pdfIn PDF document text
    • http://rasazevedip.22web.org/41952871288.pdfIn PDF document text
    • https://jesipawuba.weebly.com/uploads/1/3/0/8/130874316/2a949.pdfIn PDF document text
    • http://gamedv.design/35237488741jpe9q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393018/normal_5fd7a5139f496.pdfIn PDF document text
    • http://circulyarkadigital.xyz/employment_status_change_letter_template9jhfq.pdfIn PDF document text
    • https://mepifinifiwiza.weebly.com/uploads/1/3/4/3/134334375/913519.pdfIn PDF document text
    • https://tilapenudulaw.weebly.com/uploads/1/3/1/6/131607943/bbf6b95ea7ea49.pdfIn PDF document text
    • https://nabinavupofi.weebly.com/uploads/1/3/5/3/135350319/4aa3cc6750cb.pdfIn PDF document text
    • https://jateredadiwez.weebly.com/uploads/1/3/1/6/131606262/tabikeka-zamogivipe.pdfIn PDF document text
    • http://calipshatngaccs1.xyz/wondershare_data_recovery_android150u2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478687/normal_5fdc19de6fb01.pdfIn PDF document text
    • https://pimipile.weebly.com/uploads/1/3/4/8/134883166/317c521345c90.pdfIn PDF document text
    • https://fojanatixisi.weebly.com/uploads/1/3/4/2/134265346/labufinodujuw-xegeted-gurilafugobi-penetozotatep.pdfIn PDF document text
    • https://gixinizolovuz.weebly.com/uploads/1/3/5/3/135348456/4276303.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370560/normal_5fc5a4832925a.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/4205789.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://widopux.epizy.com/44254355475.pdfIn PDF document text
    • http://xonezerimagu.rf.gd/79683852665.pdfIn PDF document text
    • http://bexiguxiluk.epizy.com/vijugaxakojewav.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00022c6c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x22C6C 31496 bytes
SHA-256: cd1c18d07c0ec48df4b47a04e9cffdc9bf71232e80cfc288bc5d368c3eb2b1c6
font_00_sfnt_off0001d4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4E5 8328 bytes
SHA-256: adef68c8dc258b943e0867c9756a44e219f6c35aeb2538a949a876ee8e766799
font_01_sfnt_off0001f124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F124 5300 bytes
SHA-256: 63e41fcd8e95262dd59148d2976fc02b7c0b26dcb9e837c6889c159fba35db0d
font_02_sfnt_off00020318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20318 12060 bytes
SHA-256: 7551826ffc932399e649db40134e875e3071c610b85230f9f6192c4ce29a7c75

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