Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec3bb4f0764dd70d…

MALICIOUS

PDF

103.7 KB Created: 2021-02-28 17:21:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4f34db91853cfd44b0a74ac697f3516d SHA-1: f2107fdf3596c4e59200be2c318f74e855e55acc SHA-256: ec3bb4f0764dd70d1b300da36e5bb95690786f4de3e0352a20cc386848fb6796
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 directing users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and extensive link farm suggest it's designed to exploit users by redirecting them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jacksth.ru/wb?keyword=first%20alert%20p1210e%20manual PDF link annotation
    • http://fufirajonitav.22web.org/how_to_turn_on_a_jacuzzi_hot_tub.pdfIn PDF document text
    • https://vamarimorojikav.weebly.com/uploads/1/3/4/6/134640123/vibuzovufis_warivekiwu_vazid.pdfIn PDF document text
    • https://jotafatebukuzeb.weebly.com/uploads/1/3/0/7/130776674/pulidoraxi.pdfIn PDF document text
    • https://takotowi.weebly.com/uploads/1/3/4/3/134356266/mobomop-gafusiwed.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/ijdClsv/talking_tom_gold_run_hack_apk_2019.pdfIn PDF document text
    • http://tekeriset.iblogger.org/52579368610.pdfIn PDF document text
    • https://cdn.sqhk.co/goremujoz/66Dgege/easy_poached_eggs_instant_pot.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/Ahcgihf/wiraxi.pdfIn PDF document text
    • https://sutopudebesi.weebly.com/uploads/1/3/1/4/131438093/kekirijamatuzom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jazipas.epizy.com/mifejirukekaj.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/clip_india_the_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/sort_bookmarks_firefox_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/dress_code_a5_semi-_formal.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/61078687604.pdfIn PDF document text
    • http://kofezinidabefu.epizy.com/the_four_agreements_summary_review.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/wurozikafupivel.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/ios_11_beta_configuration_profile.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/70549777202.pdfIn PDF document text
    • http://fipizojuj.rf.gd/sulalikovat.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/financial_freedom_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/10118449847.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_off00015765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15765 5244 bytes
SHA-256: 70b2ba43194b5e9ceedbdf8e54475148fe6db1d9321b898767bf30827c21c1c5
font_01_sfnt_off00016929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16929 11192 bytes
SHA-256: 2fef5603ab1a25f458b8605779d965c15d55ca680bc6f632bca93f26379fd165

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