Malicious PDF — malware analysis report

Static analysis result for SHA-256 f96d80ffc7d2cad1…

MALICIOUS

PDF

74.9 KB Created: 2021-03-03 10:33:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: a96a4cc97d87645cd2f47e0aa5b07f6d SHA-1: 586d23f6688dc41ec823d590349a712192bb9625 SHA-256: f96d80ffc7d2cad172d8afc4f7378afc7e44f5efbc3b9085715033b3a26d4ba6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting and acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms the nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=mil+soles+esplendidos+resumen PDF link annotation
    • http://voyazh-shina.com/domuvcs87g.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/6wvT6hg/90_country_music_internet_radio.pdfIn PDF document text
    • http://clubstore.pro/pubowimabupusomavafinotkipug.pdfIn PDF document text
    • http://driveformclanemilwaukee.com/25713287837mvmro.pdfIn PDF document text
    • https://cdn.sqhk.co/xumirikebixo/UgcAghd/liwiwefilokitut.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/raneliwuwetusogududan.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/79345770270.pdfIn PDF document text
    • https://kelogukagikuval.weebly.com/uploads/1/3/0/7/130739039/efab6.pdfIn PDF document text
    • https://teraxamexad.weebly.com/uploads/1/3/1/3/131380600/bexub_mijezojuduse_xewodosixaz.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/gdiNjfV/bawolatizator.pdfIn PDF document text
    • https://boxijobanopuvob.weebly.com/uploads/1/3/0/7/130739783/1433860.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/igozgha/chex_quest_wad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506170/normal_6026bd8a64f1f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nizalag.rf.gd/free_fall_coloring_sheets_for_preschoolers.pdfIn PDF document text
    • http://lokuvutifinulef.rf.gd/disujadeparesugowawajede.pdfIn PDF document text
    • http://rowomasogig.epizy.com/73170591681.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_off0000e912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE912 4900 bytes
SHA-256: 95ba52978761549d25a5993104f958cb02e5c5c567abf0cfe9dce156a0954317
font_01_sfnt_off0000f9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B0 11144 bytes
SHA-256: d4b05b58e18e8272da0ee12ae8aa58235065da4ab4a018757a6c6e87e50b3fd9

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