Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f7d3914b46be77…

MALICIOUS

PDF

100.7 KB Created: 2021-02-26 01:51:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 566cb1dc24e69310ef12592f4f5462bf SHA-1: 3bae8f3cb75bb1c0b7ffc90a42be27f914090341 SHA-256: 12f7d3914b46be77cbeb7ffc0506586cfaf1d2d72a8dda8c1afb0b55882d3bac
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to various PDF files hosted on disposable domains, indicating a link farm or distribution mechanism. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution through these linked documents. The presence of numerous external URIs and a link farm heuristic confirms the document's primary function is to redirect users to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/strik?utm_term=first+alert+7010bsla+chirping PDF link annotation
    • http://zupedaganivo.66ghz.com/72173743556.pdfIn PDF document text
    • http://mazezoda.22web.org/drawing_bar_graphs_worksheets.pdfIn PDF document text
    • https://sumomaduge.weebly.com/uploads/1/3/4/8/134884200/nukoweki.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/hbjejcr/new_berserk_episodes_2019.pdfIn PDF document text
    • https://dikekivex.weebly.com/uploads/1/3/0/7/130775400/zifubunawekisakemodu.pdfIn PDF document text
    • https://cdn.sqhk.co/puvelumilum/didrVhf/bevexoxaj.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/adzS85r/dodilavonagaxafo.pdfIn PDF document text
    • http://vykupavto54.ru/51524500376qwtzy.pdfIn PDF document text
    • http://fodokimi.22web.org/interview_questions_and_answers_for_nurses.pdfIn PDF document text
    • http://sokelekife.iblogger.org/install_jasmine-_allure-_reporter_npm.pdfIn PDF document text
    • http://shop-onlinediscount.xyz/d_martyn_lloyd_jones_audio_sermonshqsm0.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/cmjdzxA/nowaso.pdfIn PDF document text
    • https://dugefovi.weebly.com/uploads/1/3/1/4/131453799/8771587.pdfIn PDF document text
    • https://julasunanuk.weebly.com/uploads/1/3/4/3/134308365/zonoj-disis.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/hhig3ih/game_of_thrones_fanfiction_ice_queen.pdfIn PDF document text
    • https://kobawepa.weebly.com/uploads/1/3/1/0/131070010/mibuguseramuzuw_jotifu_buwirovut_fepelizan.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/monica_robinson_naacp_interview_transcript0sf0o.pdfIn PDF document text
    • http://limaxinsto.xyz/hp_officejet_pro_8600_disassemblyhy369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5fd0bb67e4a7c.pdfIn PDF document text
    • https://kuxaxamolexude.weebly.com/uploads/1/3/4/8/134869233/4690880.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00014b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B0A 5564 bytes
SHA-256: 6f91e72c51ed639737631daa7e2d077a39a2358ce0ecd324e1aa850b330d8267
font_01_sfnt_off00015df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DF6 11588 bytes
SHA-256: d47a6d7f7b8ad52e478e4ce7842f65a717734990bed16b644d9ab63005623621

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