Malicious PDF — malware analysis report

Static analysis result for SHA-256 f16d3caada98942c…

MALICIOUS

PDF

161.7 KB Created: 2021-03-30 13:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9d442c3f1f00a7f2202bfadbff77cc3c SHA-1: 207bce57467652c7971b132eb48dcea1c5d33c7b SHA-256: f16d3caada98942c158357bbab34850009c6c162fe553d87529e7ca064518b6d
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL suggesting a phishing lure related to a search query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of multiple external links and the overall structure point towards a phishing or link-farming attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ponafet.ru/wix?keyword=is+manual+muscle+testing+valid+and+reliable PDF link annotation
    • https://cdn.sqhk.co/bepemuno/hgjaiaV/merax_modern_simple_design_computer_desk.pdfIn PDF document text
    • https://cdn.sqhk.co/vutowogipu/WTWjawb/70077663820.pdfIn PDF document text
    • https://cdn.sqhk.co/ledoridizeme/59jygjq/17914564827.pdfIn PDF document text
    • http://desajegurake.scienceontheweb.net/85509818039.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/kenmore_elite_electric_range_replacement_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/biagrCj/sound_shore_field_hockey.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/iazUxjd/learn_spanish_beginners_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gizetinediz/yib0Qt3/60295100626.pdfIn PDF document text
    • http://xebiniseba.mygamesonline.org/10634800029.pdfIn PDF document text
    • http://xrootunited.com/what_are_the_3_stages_of_the_heros_journeygpqia.pdfIn PDF document text
    • http://bonusiotsbera.online/ferujuzugukovidafoba60y.pdfIn PDF document text
    • http://tejowigasinafu.getenjoyment.net/74819185977.pdfIn PDF document text
    • https://cdn.sqhk.co/rajexizeba/RjaHVcC/2594809311.pdfIn PDF document text
    • https://cdn.sqhk.co/vopuvafamiw/gfwyghe/tefomoxegamimuzik.pdfIn PDF document text
    • http://zijaditenup.getenjoyment.net/technical_analysis_explained_martin_pring.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/63108212967.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/padosumifubobo/dozukofiwimivekutapulorok.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/55418217144.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/bizejakejuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/knight_rider_season_2_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/51782525350.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_off00023e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23E5D 5396 bytes
SHA-256: 5d2f069ea2bc3be58e7d5969f13460b3f2bfa942594f802d469656eb9716f325
font_01_sfnt_off0002509f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2509F 11632 bytes
SHA-256: 6c877771966dcdd56f5833932dedcc08daa7923f2465c4c04d1c89cfe4041ba5

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