Malicious PDF — malware analysis report

Static analysis result for SHA-256 22cc2f481fcadb10…

MALICIOUS

PDF

63.5 KB Created: 2021-01-29 22:08:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 2a9c6ac006ebdd2ab6476684247d29b5 SHA-1: 591ce26dea795bfcb7de9671d0e81049e2b64554 SHA-256: 22cc2f481fcadb1018087731aa50b8583cbaa95a86a78277beb80c6d737a00e9
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/aws?utm_term=fragment+and+run+ons+worksheets PDF link annotation
    • https://cdn.sqhk.co/moxinivo/0gfxNib/southern_railway_drawbridge_decatur_al.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/ajihfjh/nuvetukalowezugeburekasof.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/hjPihje/77928407386.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/zuxuva.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/Nk60tic/best_chocolate_sponge_cake_recipe_without_butter.pdfIn PDF document text
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/pawigekixo-sopetuvizaguvo.pdfIn PDF document text
    • https://kavekoda.weebly.com/uploads/1/3/5/3/135326791/menixupefam.pdfIn PDF document text
    • https://dipilewojariwu.weebly.com/uploads/1/3/2/8/132814651/foson_satuzapisitojag_nukefefopa.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/nuxulikiwab/letogirati.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/grade_6_reading_comprehension_worksheets_free.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/pizuletetinunira.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/journey_2050_word_search_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/game_bully_offline_revdl.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/urethral_catheterisation.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/potikamaj.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_off0000bd11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD11 5316 bytes
SHA-256: 9bcf0e9e5073e7e47353902a848137f1bff3e751bddd05189d5d69190264980c
font_01_sfnt_off0000cf0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0F 10104 bytes
SHA-256: ca318fabc93497dfd8f8a359c8b9e9babd905282936a08a3fa9e7f4128cbb6e1