Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ed8275d369e8d8…

MALICIOUS

PDF

83.7 KB Created: 2021-02-27 18:38:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e783e9b9c58e8a428bcda65660ded870 SHA-1: 3d3175eac01b2b0172c17b92ca1faedb749a132d SHA-256: d1ed8275d369e8d88cf80d5d97bd32f7246d761f2c938f3976b3b7b78abac3f3
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, pointing to various PDF files hosted on external domains. This behavior is indicative of a phishing or malware distribution scheme, aiming to redirect users to malicious content. The ClamAV detection and ML classifier further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=carrie+book+online+pdf PDF link annotation
    • https://cdn.sqhk.co/jefigujaxev/yDoyghD/the_last_survivors_movie_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/fDvXWjb/duweruwofaju.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/felaluzom-jojoxirifezu-nonufusiz-sutixogolurij.pdfIn PDF document text
    • https://cdn.sqhk.co/kafexobesa/92rQaij/50633669225.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/dHghhbI/zagegaferaxajepesumawu.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/besogebugoko.pdfIn PDF document text
    • https://fezekisovo.weebly.com/uploads/1/3/4/6/134661064/gaxigagagax.pdfIn PDF document text
    • https://danigutido.weebly.com/uploads/1/3/1/1/131163693/tetovekegikasap_jopunazubemip_joseki.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/QU7hhxa/nike_run_club.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/aheiMc0/rinawefo.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwifudu/nJpieif/panda_evolution_cute_bear_making_clicker_games.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/8iceT0p/braum_s_ice_cream_flavors_drive_thru.pdfIn PDF document text
    • https://cdn.sqhk.co/zipirevofu/tjeXhim/battles_of_the_ancient_world_game.pdfIn PDF document text
    • https://dewubixire.weebly.com/uploads/1/3/1/3/131398231/9580662.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/hi91LIF/naval_special_warfare_recruiting_directorate.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/zatazewoz/cookies_netflix_chrome_android.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_off00010ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC1 4964 bytes
SHA-256: 2fb329f59a4cd11839bb522078006271f5aa9eb135b5b6ee5b8f4e18d415515f
font_01_sfnt_off00011faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAF 10120 bytes
SHA-256: f325e1fb2fc0b12c8a1244f118af61d660b32786ed71924761f8bfa0df64a2be

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