Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00ed9335a7b59f1…

MALICIOUS

PDF

85.7 KB Created: 2021-03-11 03:22:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f8615f365c303a4bc919ab263ef99de SHA-1: b01f49a1b1796de6c3146f848a3f93407d269996 SHA-256: c00ed9335a7b59f1165233acd23f57d4aaf94394bb79923922ca3a7ad6b6db59
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/wix?keyword=comfort+furnace+xl+manual
    • https://cdn-cms.f-static.net/uploads/4485015/normal_600a4e268756e.pdf
    • https://cdn.sqhk.co/lixipadiwel/2Mlhc4i/52115541045.pdf
    • https://cdn.sqhk.co/lewoxiguj/hJHrAji/anti_stress_ball_gro.pdf
    • https://cdn.sqhk.co/fabozesemi/C2KGLgh/neon_running_shoes_ladies.pdf
    • http://onlineeshop24.xyz/o_nascimento_da_biopolticandjcs.pdf
    • http://picsonair.com/yiruma_river_flows_in_you_sheet_music_violinvoruz.pdf
    • https://cdn-cms.f-static.net/uploads/4462993/normal_6033c2ccd3449.pdf
    • https://cdn-cms.f-static.net/uploads/4406191/normal_603075bb9b857.pdf
    • http://wifudimitalon.22web.org/65932570186.pdf
    • http://kinorio5.xyz/amazon_echo_dot_with_clock_nzo759i.pdf
    • http://repair-planshetov.ru/tovinakene8oe1f.pdf
    • https://static.s123-cdn-static.com/uploads/4450421/normal_5fcf9e8de8ab8.pdf
    • http://luxshop21.site/aur_ahista_kijiye_baatein_song_downloadgw3ht.pdf
    • http://kefovatoxag.22web.org/bejox.pdf
    • https://cdn-cms.f-static.net/uploads/4484814/normal_5fd130cc10a05.pdf
    • https://cdn.sqhk.co/juxezijafoz/iifkj0D/raleradazudexowe.pdf
    • https://cdn-cms.f-static.net/uploads/4410459/normal_60341964a2d22.pdf
    • https://cdn-cms.f-static.net/uploads/4380692/normal_60176e39cf3f7.pdf
    • https://cdn.sqhk.co/remowiwa/0LlSmX6/pajotokibeser.pdf
    • https://static.s123-cdn-static.com/uploads/4473035/normal_5feb1089309d3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a765b249-d442-4b07-8ea9-8318d996b894.filesusr.com/ugd/902d29_1e8f711bf67f4651a7298aca4568f678.pdf?index=true
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_d2e3dc38c7b54a2c8103e76d8a8256b5.pdf?index=true
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_3f01a7843b1d4633a57c8b6fd4d50ade.pdf?index=true
    • http://kikisitakas.rf.gd/gaali_chirugaali_song_in_telugu.pdf
    • 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_off000114aa.bin
6a1bdd2529812bc07036d9229183b60929cbb61de6ab9d6fb123a00dbf4e0cac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114AA 4824 bytes
font_01_sfnt_off000124fc.bin
a8e28ffd35e8ea8b8f87a9b74645df5cc602d45b5b8b1d97bc8fb8b601b92e55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124FC 10812 bytes

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