Malicious PDF — malware analysis report

Static analysis result for SHA-256 78cf0c6889175cef…

MALICIOUS

PDF

91.4 KB Created: 2021-02-26 18:00:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0664e6da370830263bc7cf778550f7fa SHA-1: e680567a6ee21c484f58a7daca48ebdeb494e9a2 SHA-256: 78cf0c6889175cefed6a3c53d8b840ece9d02bf3fcdb982a3067c9a718a74cf4
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 domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, likely to distribute phishing lures or malware. While no scripts were explicitly extracted, the presence of embedded URLs suggests an intent to redirect the user to malicious content.

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://xajibur.ru/123?utm_term=escort+8500+x50+vs+9500ix
    • http://wotukujis.sportsontheweb.net/jokokalemo.pdf
    • http://jekeluxuto.mywebcommunity.org/union_plumber_salary_nj.pdf
    • http://fupemagis.mywebcommunity.org/cisco_ccna_200_301_command_guide.pdf
    • http://davupopebuwiser.sportsontheweb.net/how_long_have_jails_existed.pdf
    • https://static.s123-cdn-static.com/uploads/4486041/normal_5fc98c0e7ae11.pdf
    • http://mowefopovog.mywebcommunity.org/xosewuzamodamodarudir.pdf
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/kumivabobaratag.pdf
    • https://cdn-cms.f-static.net/uploads/4475572/normal_5fdc393b1d191.pdf
    • https://tujulita.weebly.com/uploads/1/3/4/6/134687611/948809.pdf
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/7529364.pdf
    • https://ragojozuzaz.weebly.com/uploads/1/3/4/6/134668900/bufajipun.pdf
    • http://falorilipeb.mywebcommunity.org/the_lord_of_the_rings_movie_collection.pdf
    • http://xorabawik.medianewsonline.com/vorelulatipazalupe.pdf
    • https://static.s123-cdn-static.com/uploads/4369769/normal_5ffcf13a06090.pdf
    • http://lamaded.mywebcommunity.org/90550519528.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/novifamigot/xububawebebabi.pdf
    • https://s3.amazonaws.com/zifilobesumafi/70675055338.pdf
    • http://ketabigumowun.atwebpages.com/how_much_to_start_a_pawn_shop.pdf
    • https://s3.amazonaws.com/xamibebulosaxug/davebovemiberififoroj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012a87.bin
7f011bf38e1b518f77aa8472cfdb0f33523a4abed56c6a5098ad3ecf9e69f441		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A87 5252 bytes
font_01_sfnt_off00013c87.bin
1be1758b1e6365b8b69dd8cc57b860c072b1c1c2730094d733290a4fd0447941		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C87 10496 bytes

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