Malicious PDF — malware analysis report

Static analysis result for SHA-256 80229d1b593eddef…

MALICIOUS

PDF

78.6 KB Created: 2021-03-31 14:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ebd5fd182f5d3159d186def8928be4f SHA-1: bf68928e6b908826be1803ad4b05e2f4b052e330 SHA-256: 80229d1b593eddefd72c842bd34138120c89101dd04e5d08604ed1b5a0000dd6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files. One of the primary URLs identified is https://baarspo.ru/award?keyword=aiag+cqi+20+pdf, which suggests a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware through the linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=aiag+cqi+20+pdf
    • http://uscreditcheck.info/how_to_change_kindle_ownershipoox9s.pdf
    • https://bujipivew.weebly.com/uploads/1/3/4/1/134131373/vetodetovamepozoka.pdf
    • https://zumikifekov.weebly.com/uploads/1/3/0/8/130813997/vivalawoxe_ribasobuvatelew_zuxigodofab_povonoba.pdf
    • https://tedurupezatijex.weebly.com/uploads/1/3/4/7/134757343/42ea3a3c66c8.pdf
    • https://static.s123-cdn-static.com/uploads/4369324/normal_5fca5cfddfe36.pdf
    • http://kojanusipesipe.scienceontheweb.net/belajar_bahasa_inggris_pemula.pdf
    • http://nunovoxiwanafuz.getenjoyment.net/tapomojaxo.pdf
    • https://static.s123-cdn-static.com/uploads/4426966/normal_5fffd7eadbc4d.pdf
    • http://huseyincanx.com/44602968851xmvnv.pdf
    • http://tebapewulodafe.getenjoyment.net/hp_elitebook_folio_9470m_i7_price_in_india.pdf
    • http://italiahot.space/96769518828fmzo9.pdf
    • https://folenepawesig.weebly.com/uploads/1/3/2/6/132680852/4b0ea47e2.pdf
    • http://neridofufuleteg.scienceontheweb.net/48157857233.pdf
    • http://lijonotogi.scienceontheweb.net/biblia_cristiana_nuevo_testamento.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kafises/dogamig.pdf
    • http://wufagezigedo.onlinewebshop.net/44550657025.pdf
    • https://s3.amazonaws.com/jupevuxirapi/archero_cheats_android_reddit.pdf
    • https://s3.amazonaws.com/votawawo/iso_9001_certified_institute_in_punjab.pdf
    • https://s3.amazonaws.com/zoxewudunigus/customer_representative_interview_answers.pdf
    • https://s3.amazonaws.com/devuxuzejozam/meximabagevigudikev.pdf
    • http://doxokalisawe.myartsonline.com/maths_books_for_competitive_exams_in_english.pdf
    • http://zubiluwetij.myartsonline.com/10973239425.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2ef.bin
91f85c3fbc765900ba2ffebc288de5eabb1ca67ff5402f1a3d59045c80ee1f92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EF 5404 bytes
font_01_sfnt_off0001056b.bin
42490bc65379f34626aa8b983844bbe640996b03819967440a4f49faa9bde175		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1056B 11556 bytes

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