Malicious PDF — malware analysis report

Static analysis result for SHA-256 139a0c42b13f031d…

MALICIOUS

PDF

71.4 KB Created: 2021-02-27 12:50:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ee47c0cfc96ecc08209922fa7b47c492 SHA-1: 0617f02422174888f548cbf7ff1e3c6a79292e0a SHA-256: 139a0c42b13f031df84e7f99fe3cce86a411e4d58cabb6a2424ce5c2ff5d6cdb
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://druttle.ru/award?keyword=fraction+bars+worksheets+3rd+grade PDF link annotation
    • https://senamevab.weebly.com/uploads/1/3/4/6/134689233/3ed88354b.pdfIn PDF document text
    • https://cdn.sqhk.co/dutedape/jeid8je/stackable_washer_and_dryer_dimensions.pdfIn PDF document text
    • https://fipugodegiposal.weebly.com/uploads/1/3/4/6/134687615/lelotelemosavunabuli.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/ji5ZWjj/21425502450.pdfIn PDF document text
    • https://dugumali.weebly.com/uploads/1/3/1/4/131437411/1299673.pdfIn PDF document text
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/7702433.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/Zuha22K/38009144407.pdfIn PDF document text
    • https://nupebovewurezo.weebly.com/uploads/1/3/2/7/132710783/8773267.pdfIn PDF document text
    • https://cdn.sqhk.co/tunaluvum/QhfjhiO/stair_dismount_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajulugebimisu.myartsonline.com/sikutepuwijosidazexu.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/crescent_bay_laguna_beach_surf_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/94347340593.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/al_quran_tajwid_dan_terjemahan_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/wawenumujuwel.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/ap_stylebook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/best_game_of_thrones_mod_for_medieval_2_total_war.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/100_doors_level_27_answer.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_off0000d932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD932 5584 bytes
SHA-256: 4a166e25ab0a8a519d98534e038636c6f85078f4d7c57e51b126ef34c4a06f4b
font_01_sfnt_off0000ec38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC38 10488 bytes
SHA-256: 724213427b28f19775d432a332b66d20efbcabe64df7ec770671d955b4c5aa15