Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4cee04df28101b6…

MALICIOUS

PDF

80.0 KB Created: 2021-03-31 00:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 04ed517327a437c0647b1cf792dde20c SHA-1: 075adbdc6639f8e33d5e3103ccb8c3e12ed45daf SHA-256: c4cee04df28101b65bec29a50bf869980ae520c8c109010c9c456a8fb0863bed
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, including one pointing to 'seumenha.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to medical research to entice users to click on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/award?keyword=acute+myeloid+leukemia+pathophysiology+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449973/normal_604ece9628e50.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/gjDXBib/47751842928.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378425/normal_5ffb9031837bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392860/normal_605b81594d7a4.pdfIn PDF document text
    • https://cdn.sqhk.co/rogolafu/bjccjck/samurai_ii_card.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/hbeiacG/final_fantasy_all_the_bravest_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417426/normal_606395302bf66.pdfIn PDF document text
    • http://xekaminam.22web.org/resumo_do_livro_o_alienista.pdfIn PDF document text
    • http://menavuselixeba.iblogger.org/the_haunted_history_of_halloween_worksheet.pdfIn PDF document text
    • http://arfeshome.com/480796619011nkhj.pdfIn PDF document text
    • https://cdn.sqhk.co/videbamez/NhdVfej/lumakelekol.pdfIn PDF document text
    • http://sedouche.xyz/978161795491ukwk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://movalezipukud.epizy.com/50757687605.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/jabafinofefuvapiwidi.pdfIn PDF document text
    • http://rodiwube.epizy.com/17689447123.pdfIn PDF document text
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_8d7684d1ef644cc1a21b3b1f04b0fdb7.pdf?index=trueIn PDF document text
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_608140c2f42b44e8a3f14bddb18f2de6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/atwood_rv_furnace_parts_diagram.pdfIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_2be03363549a46f1826602ea0ff9a548.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rebomedug/kudanekulibuganerenutug.pdfIn PDF document text
    • https://972af30b-04c2-4618-b911-83ba0b7fef9e.filesusr.com/ugd/84a5c6_43303b3a0395498c86a0ae806008ca03.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/76557925685.pdfIn PDF document text
    • http://rapuzivawa.epizy.com/ethiopian_amharic_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/54739293913.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_off0000fba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA5 5628 bytes
SHA-256: 3e676b1e4ba5390b933dde4ebaad70e548f415215f5aefa2f9bc55d8ff06a4fe
font_01_sfnt_off00010eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB4 10488 bytes
SHA-256: 94b2c2893e1a7a1e3412f7967eca1b626bd09f4cddc1882b3117670e0dd47113

Open this report in the interactive analyzer, or submit your own file for analysis.