Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea5f1ecddbf7735…

MALICIOUS

PDF

77.4 KB Created: 2021-04-03 13:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 037cfd85d67d752e625714faf26e26d0 SHA-1: 478eb80d2f3521b9fcc9f1c6d300ce9c0eff6e06 SHA-256: 0ea5f1ecddbf77352f2b6757893e8b4b6e9ac5debaa4db5a1237e6a4c47b11bc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable or suspicious domains, indicating a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a malicious attempt to redirect users. While no scripts were explicitly extracted, the ML classifier and ClamAV detection confirm malicious intent, likely involving exploitation of PDF vulnerabilities to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://fsbsiod.com/34334561520c72sg.pdf In PDF document text
    • http://greenbike.shop/kazojikogiwitibidceghj.pdfIn PDF document text
    • https://tapojanez.weebly.com/uploads/1/3/1/3/131398133/85f53e75.pdfIn PDF document text
    • http://vnds-v.website/24478863772ge3ho.pdfIn PDF document text
    • https://jibowosiz.weebly.com/uploads/1/3/4/6/134632869/4603150.pdfIn PDF document text
    • http://rakomakefike.iblogger.org/geometry_triangle_theorems_and_postulates.pdfIn PDF document text
    • https://pamezupiv.weebly.com/uploads/1/3/0/7/130775156/1093200.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/dGBpiea/prop_hunt_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/51uBRXT/12054460520.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/LgeeSDP/light_purple_tie_dye_background.pdfIn PDF document text
    • https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/cc42a2c3d508.pdfIn PDF document text
    • http://zusozujowumid.iblogger.org/eureka_airspeed_exact_pet_vacuum_belt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/bVCGPfG74RQ/wb?keyword=how%20do%20you%20sing%20in%20spanishPDF link annotation
    • http://gepabakewedi.epizy.com/53325402741.pdfIn PDF document text
    • http://golorawubupub.rf.gd/39060860853.pdfIn PDF document text
    • http://vufagozujidivu.epizy.com/zexenenejagilufowilal.pdfIn PDF document text
    • http://pidukegub.epizy.com/56306567767.pdfIn PDF document text
    • http://vukotirigepiv.epizy.com/zolpidem_bula_profissional.pdfIn PDF document text
    • http://jotikovan.rf.gd/printable_piano_sheet_music_hymns.pdfIn PDF document text
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_b4ade3c273cf425b8cd8bdfac1a4d141.pdf?index=trueIn PDF document text
    • http://vixaxupofu.rf.gd/chicken_biryani_recipe_in_bengali_download.pdfIn PDF document text
    • https://369206df-e466-4f8f-9771-850d1edb33c5.filesusr.com/ugd/8fd5dc_7d5f43d1846242a3ad2cbae9aabf9572.pdf?index=trueIn PDF document text
    • http://lawigut.rf.gd/assistant_accountant_job_description.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD861 5248 bytes
SHA-256: c58cb53f418906df80fd484a07bda12fd867c32052199ee4bbfb38cec0190194
font_01_sfnt_off0000ea51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA51 12516 bytes
SHA-256: 4054480907444a2342f40614c2755adb26e4c4719da67e7bd99b90fdc1005ab5
font_02_sfnt_off00011367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11367 16068 bytes
SHA-256: bd4ec210b6f0bed3603b49d512cd9a08d3e9d1e81fcf206800274a46106400dd

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