Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e8191de26e4ea14…

MALICIOUS

PDF

85.2 KB Created: 2021-03-15 07:13:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: cb9953249e74b30547b9e9580bbf71b9 SHA-1: c2c807088376ed3169303165b01a060c2f3ae5fb SHA-256: 5e8191de26e4ea14091806f37b877e51b11ac8d5c3cc3c677aae85750a02c78e
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 phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded links suggest a link farm or SEO poisoning attack, aiming to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://midufefew.ru/wix?keyword=thermochemistry+and+thermodynamics+worksheet+1+answers PDF link annotation
    • https://cdn.sqhk.co/gotubosif/hgdhanO/bibewawilitedamomufolinu.pdfIn PDF document text
    • https://debagodijif.weebly.com/uploads/1/3/0/9/130969595/milinufaku.pdfIn PDF document text
    • https://cdn.sqhk.co/zexoribuj/gjc1hi1/join_blocks_merge_puzzle_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zodunoxurob/jesbhdD/81876702627.pdfIn PDF document text
    • https://zulitaxovali.weebly.com/uploads/1/3/5/3/135351491/4431143.pdfIn PDF document text
    • http://zirosax.iblogger.org/how_to_cosmic_client_on_mac.pdfIn PDF document text
    • https://tefegepivovopuf.weebly.com/uploads/1/3/5/3/135311357/nizefafok_zonin_tawot_lamibajul.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/jiguwuzobozobaz/grammarly_apk_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/vutawatiziwol.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/maytag_2000_series_washer_reset_button.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/biblical_counseling.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/fisixafulunujitafi.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/43533966656.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/difficult_linux_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/fetiludaf.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/34566420908.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/citrix_access_gov.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/zonewuveju.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/easy_boogie_woogie_piano_free_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/dilawebo.pdfIn PDF document text
    • http://kewumexor.epizy.com/63937684067.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/arc_length_in_parametric_form.pdfIn PDF document text
    • http://tiworetaganufo.epizy.com/visogagegeg.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_off00010c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3C 5404 bytes
SHA-256: 2da85e12229a60721dadb27c69cf608fe8af44e8de39792651cc53e81b2f02d4
font_01_sfnt_off00011e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8E 11740 bytes
SHA-256: 1af642255541d90d37c204d6368955a161c022c50ca85fbcdcf05e2bf52dff77

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