Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b8c29203116f6c…

MALICIOUS

PDF

77.8 KB Created: 2021-02-26 02:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9db8433e6a72e2001130d8403cdead00 SHA-1: fdbff1c0a4cbe741080bb2905358f8e9398441d9 SHA-256: 04b8c29203116f6c9bd035d381d3a627eaf4268171e78d9fa23269a9185f9ea5
134 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate maliciousness. The presence of a download button lure further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/123?utm_term=ezdrummer+2+free+download+full+version PDF link annotation
    • http://grafoanaliz.ru/pepotukuroromewibozowazesdsoih.pdfIn PDF document text
    • http://lessonsonline.site/mifepitadazirixisurod5hcbl.pdfIn PDF document text
    • http://tdsevsvet.ru/buwageripirusezogijupu7s1z3.pdfIn PDF document text
    • http://easy-money-cash.space/autocad_download_for_pcbcl2h.pdfIn PDF document text
    • https://zokejiwiperasuk.weebly.com/uploads/1/3/4/6/134668939/foligis.pdfIn PDF document text
    • https://nujalujuxak.weebly.com/uploads/1/3/5/3/135347358/353d93850c.pdfIn PDF document text
    • http://armlur.space/le_petit_prince_chapter_18_englishhbp2h.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/votawawo/gemini_investments_holdings_limited_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/judirato.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/used_link_belt_crawler_cranes_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/lg_cosmos_3_vn251s_-_black_verizon_cellular_phone.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/2012_dodge_avenger_sxt_hp.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/how_to_pair_plantronics_voyager_headset_to_computer.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/john_deere_71_planter_history.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/what_is_better_a_single_stage_or_two_stage_snow_blower.pdfIn PDF document text
    • http://dufexisoji.rf.gd/spoken_english_grammar_classes.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_off0000f36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36A 5344 bytes
SHA-256: 42d29229330866983af097785de73258793df8ea98da0c6dd95bdb2ad1f8e2fd
font_01_sfnt_off000105a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A0 10612 bytes
SHA-256: e0acc9643a8ab1e8bdfa226dcc72f9c2b8dc35169b4d08cecb7fd3e3df09a091

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