Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c56d21e803da662…

MALICIOUS

PDF

79.6 KB Created: 2021-04-03 12:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1215751e58e05b0d7be3bbc328d35c80 SHA-1: 8c4d3ab87aac208df894a7ce81203c384059ca9c SHA-256: 1c56d21e803da66297c2b885723d3e2e006ff91d21f2ee0020238fa4f0ed8c0d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are structured as SEO-optimized URLs, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' point towards a campaign designed to drive traffic to a network of sites, likely for malicious purposes such as phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/wix?keyword=single+syllable+words+that+start+with+w
    • https://cdn.sqhk.co/nuzifixe/gihebJu/fox_news_live_stream_free_online.pdf
    • https://cdn-cms.f-static.net/uploads/4412413/normal_6049e11c06b63.pdf
    • http://idealicaitaly.site/wajorivigokezdy1u.pdf
    • http://taher-tcac.com/pojikerunopokatah078y.pdf
    • http://shimano-stradic.ru/vufizu6eupw.pdf
    • https://nixujukasal.weebly.com/uploads/1/3/1/6/131636737/72eb325f9d.pdf
    • http://sosed.market/tepumplqc7.pdf
    • https://cdn.sqhk.co/vimerokil/jfw5jjk/where_is_the_launcher_key_on_my_chromebook.pdf
    • https://zupuluduwiwafop.weebly.com/uploads/1/3/2/6/132681460/rolebeguk_bagasaf_dodeso_menon.pdf
    • http://teenagetutor.online/how_to_set_up_scotts_broadcast_spreader12a6c.pdf
    • https://cdn.sqhk.co/nilesatu/2bGjj9g/87352709425.pdf
    • https://cdn.sqhk.co/divoxisig/WRpjiY8/murder_mystery_party_game.pdf
    • https://static.s123-cdn-static.com/uploads/4393754/normal_5fdffe8398291.pdf
    • https://cdn-cms.f-static.net/uploads/4447460/normal_6038c4a5300d8.pdf
    • https://wuwosafojopog.weebly.com/uploads/1/3/1/4/131407683/fevidezifos.pdf
    • https://xitozenajoxoge.weebly.com/uploads/1/3/2/6/132681812/vegudibasabef.pdf
    • https://cdn.sqhk.co/gefimiwotux/aidieLa/rugby_league_nz_vs_lions.pdf
    • http://rawenspant.online/the_urban_farmer_denverndk8u.pdf
    • http://kinoogf.space/72050986558fgwkw.pdf
    • https://cdn.sqhk.co/sugojipo/2G9ggha/walking_by_faith_ministries_killeen_tx.pdf
    • http://esmoney.site/hp_deskjet_6940_color_ink_cartridgekvzo1.pdf
    • https://cdn.sqhk.co/piwojosexaja/jeicKih/flying_fidget_spinner_in_amazon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9ac.bin
1d428ad3ad1f9c4d7e55a3100479a072a0d98cc108e14ba96cf3b37c717c4d53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AC 5524 bytes
font_01_sfnt_off00010c80.bin
39acc784c88c7cc759672d209b204985693440122898baaa1e99c84658d4a490		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C80 10684 bytes

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