Malicious PDF — malware analysis report

Static analysis result for SHA-256 d842604932e274f6…

MALICIOUS

PDF

75.3 KB Created: 2021-02-27 18:55:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f29cef2d2b770d7d5e54a4facf42ec82 SHA-1: 3cce4216d73da5ed7e40c6d64736043a3a6069c3 SHA-256: d842604932e274f6abe1aeabeccfb8a2fb70132f6c39ed8fec3f4a3375fcb529
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm. Numerous embedded URLs point to disposable domains, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a keyword that might be part of a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/wix?keyword=crab+rave+sheet+music+easy PDF link annotation
    • http://datab.vip/vixakataraga51xra.pdfIn PDF document text
    • http://freehookup.xyz/mean_median_mode_variance_and_standard_deviationsd2yq.pdfIn PDF document text
    • http://prodit.space/nunawifitaropigaiyz62.pdfIn PDF document text
    • https://cdn.sqhk.co/fenozidu/mjfggYn/38380921061.pdfIn PDF document text
    • http://telemprom.xyz/diamond_infinite_edge_pro_vs_pse_stinger_maxplzc6.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/biwibijajugiwisi.pdfIn PDF document text
    • http://nout-prodat.site/20921791837tck2w.pdfIn PDF document text
    • http://povulofi.mywebcommunity.org/68788516051.pdfIn PDF document text
    • https://cdn.sqhk.co/puxezuxivas/jgehbji/fivovobovovaj.pdfIn PDF document text
    • http://ins.expert/bemudinmtf7g.pdfIn PDF document text
    • http://leftoutclub.com/how_to_structure_a_real_estate_wholesale_dealwrss7.pdfIn PDF document text
    • http://uber-global.com/89476692115mnmse.pdfIn PDF document text
    • http://anarchymedya.com/c_form_border_style_none_resize6wk0m.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/cKGwJhd/23643529064.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/Rhijgjf/game_creator_free_download_full_version.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/svr8Bgc/jejip.pdfIn PDF document text
    • https:///www.youtube.com/watch?vIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zujugefov.rf.gd/sepas.pdfIn PDF document text
    • http://jonegukum.epizy.com/habitual_past_tense_worksheet.pdfIn PDF document text
    • http://sadubobuzol.epizy.com/60386425794.pdfIn PDF document text
    • http://wosetufawotuf.epizy.com/93540854006.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/aew_revolution_uk_results.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_off0000dfde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDE 5216 bytes
SHA-256: 30b23fe98e0c065f42c8a0e35098996215e73deb6051499700aef31245757842
font_01_sfnt_off0000f17b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17B 14868 bytes
SHA-256: 4b8d04c382226e0455d42045b16b171bc29fa8a73aa6fb1b59a344b768a167cd

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