Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd450911b9239e3…

MALICIOUS

PDF

75.6 KB Created: 2021-03-18 15:00:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c63dc253490d2d96652108ae218255e5 SHA-1: 5652709b13e69aa3d4d1dbbbaa2d11076fa32df2 SHA-256: bcd450911b9239e388d7c380889ed0b95af3e7f04ab3c357a5a06b448aa73596
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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://seumenha.ru/strik?utm_term=cuantos+metros+tiene+un+metro+cuadrado PDF link annotation
    • http://vifezitenof.getenjoyment.net/how_do_you_manually_turn_on_a_rain_bird_sprinkler_valve.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Gijjhq7/vepoxonojimugapotap.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/700c6.pdfIn PDF document text
    • http://smartcoin.design/ripivoxunuvikejigixuz879n.pdfIn PDF document text
    • https://sekekipozikevaw.weebly.com/uploads/1/3/3/9/133997985/poduzevut.pdfIn PDF document text
    • https://cdn.sqhk.co/jomutepe/dihsZih/zombie_gunship_survival_cheats_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_60178785599b1.pdfIn PDF document text
    • https://diveziriluro.weebly.com/uploads/1/3/4/4/134447321/wiwiruvapibawivejuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467571/normal_5ff6d11dacb92.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/jD6tjgg/marketing_planner_template_excel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478927/normal_600117b81aa02.pdfIn PDF document text
    • http://presalon.xyz/684665681394xd68.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/mad_school_address_karachi.pdfIn PDF document text
    • http://carluxepaint.site/introduction_to_philosophy_classical_and_contemporary_readings_8th_edition_onlinej3zvt.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/dobikasukavu/rosemount_3051tg_price.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/kuwekufofapa.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/91561979471.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/tomb_raider_definitive_edition_game_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/ethel_smyth_sheet_music.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_off0000e621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE621 4956 bytes
SHA-256: b5ac066c0612a3bfaf7143077160ff7dfe6127c153af41c56659a1bd0f3fc478
font_01_sfnt_off0000f6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E0 12332 bytes
SHA-256: 35fdaf49282ce889aaf1d16f51582674a0b1ed5c8a0364a5c1032f9a22f02e06

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