Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b535f0291bcba0…

MALICIOUS

PDF

65.5 KB Created: 2021-03-10 18:53:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 74fc554062abd54165a5ff8eac459e84 SHA-1: 24addd2bef125e6393d560e7dc40e4145412e4be SHA-256: d2b535f0291bcba0aa9f9bb1d801117d71b2e07b3bd3b9655f20692ecb50e09c
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/123?utm_term=dettol+cleansing+surface+wipes+data+sheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469824/normal_5ffb6be7ad365.pdfIn PDF document text
    • https://sopoxovolofu.weebly.com/uploads/1/3/4/5/134509961/6438182.pdfIn PDF document text
    • http://bigno.space/how_a_realist_hero_rebuilt_the_kingdom_rawkodze.pdfIn PDF document text
    • http://shtangye.xyz/epson_wf_2630_sublimation_reviewf9nxm.pdfIn PDF document text
    • http://navalny.design/kidopatidawuwemir64dd.pdfIn PDF document text
    • http://centerbluebadge.com/android_games_apps_freef9w3k.pdfIn PDF document text
    • http://comforfemj.fun/apc_back-_ups_es_700_manualbkfk3.pdfIn PDF document text
    • http://autokenn.com/votalifat535oh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459784/normal_601cd178be802.pdfIn PDF document text
    • https://zubowosusotikip.weebly.com/uploads/1/3/1/6/131637009/670185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481064/normal_602a14c1c9ef7.pdfIn PDF document text
    • http://erogan-encolumbia.site/dagijalezolqfxi.pdfIn PDF document text
    • http://online-sistem.site/palaludizn414.pdfIn PDF document text
    • http://reduslim-italy.site/ropulufujenutiuuras.pdfIn PDF document text
    • http://fortuneo-enligne.com/backflip_challenge_tiktokbdpp0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dekogamik/telugu_bible_free_for_mac.pdfIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_dfbed191eaab433aa6a0d1a4950a84a6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/defujo/sozituzolerifuden.pdfIn PDF document text
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_445a6be6fd794595b5920ba5598bc087.pdf?index=trueIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_92f384c340d3407fab57d6e34731b204.pdf?index=trueIn 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_off0000c336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC336 5508 bytes
SHA-256: 9c8ec69f252d5f173d115d2aa1011e19194024fdbe4868acb5dac563b5e7eaa3
font_01_sfnt_off0000d604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD604 10112 bytes
SHA-256: fd34515998dbbf34f8fe1902d571d496ebb8386a6a21dc19db5a3b9c7acbb7c9

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