Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd65457954900b86…

MALICIOUS

PDF

80.1 KB Created: 2021-03-10 01:46:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 36e4f062bbf4782fcea859fe8ff1fd71 SHA-1: d222ae0a09d50240028f95669c9ebd15e0a55ed6 SHA-256: bd65457954900b867af3cfc881025c41ce46fb73aada6d3793a26d09b85a8fb0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains embedded URLs that redirect to suspicious domains, including one that appears to be a link farm designed to host multiple PDF files. The document body, though heavily obfuscated, contains text related to search queries, suggesting a lure to external malicious content.

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://druttle.ru/strik?utm_term=how+to+change+time+on+g+shock+5146 PDF link annotation
    • http://timedezalug.iblogger.org/james_and_the_giant_peach_aunts_cartoon.pdfIn PDF document text
    • http://trackcreditscore.info/dafumujevufudoronadopci6x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473410/normal_6023d2e80e140.pdfIn PDF document text
    • http://tikewifijub.22web.org/coleman_catalytic_heater_fuel_type.pdfIn PDF document text
    • http://xofebuledat.scienceontheweb.net/dell_latitude_e6430_battery_light_flashing.pdfIn PDF document text
    • http://fruit-italy.space/53646010873pmvsx.pdfIn PDF document text
    • http://lightstart.xyz/how_to_descale_delonghi_magnifica_33001nsxj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490920/normal_603a4ad0767bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374843/normal_5ff2c0472fd2e.pdfIn PDF document text
    • http://bodurum.iblogger.org/pibupe.pdfIn PDF document text
    • http://siankaanmexico.com/vewujiwebusotuzsvtb1.pdfIn PDF document text
    • http://akmurzina.com/349086836306xgz4.pdfIn PDF document text
    • http://geleostone.online/2690724439505r7l.pdfIn PDF document text
    • http://copyright-central-media.com/here_i_am_lord_organ_sheet_music_free2ilb8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/15012277077.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/zojirushi_rice_cooker_cleaning.pdfIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/dbx_driverack_pa2_dj_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/38693871840.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/cantate_domino_nancy_hill_cobb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9D 5408 bytes
SHA-256: d90cfd06f9dc1fa7ab643a2a7de21c18a7ff84989f8bc06ee87ccd82f40db530
font_01_sfnt_off0000fff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF7 10876 bytes
SHA-256: b6768b2706ea3552a3e856f6e3a12cf6fd9ae4a0a61e552696f4982a437e05be
font_02_sfnt_off000124f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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