Malicious PDF — malware analysis report

Static analysis result for SHA-256 89864a81a615e6ab…

MALICIOUS

PDF

76.3 KB Created: 2021-03-23 05:15:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03e1c1bade40942f1fee50d2cb6910ac SHA-1: 994b53bdf35c038c44dfe2655af28f46cab48c61 SHA-256: 89864a81a615e6abe355323c68dad0b67ce9a72ceb8f7d910080c3e92c7b910d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with the primary one being https://xezojetit.ru/123, suggesting it's used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to 'abstract template pdf' and 'wkhtmltopdf', indicating a potential lure to disguise malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/123?utm_term=abstract+template+pdf
    • http://tulotipokumubo.iblogger.org/kogozejovekowevet.pdf
    • http://watewuwij.22web.org/aikido_basic_techniques.pdf
    • https://cdn-cms.f-static.net/uploads/4418000/normal_602859aeab589.pdf
    • http://xexisutufas.iblogger.org/26555097409.pdf
    • http://tikovg.xyz/cheat_droid_root_only_pro_apktrvbi.pdf
    • https://cdn-cms.f-static.net/uploads/4499283/normal_60316152c8e5f.pdf
    • http://dirtygirl.fun/34451568567qd039.pdf
    • https://cdn-cms.f-static.net/uploads/4393779/normal_602ae63e8e04d.pdf
    • http://honey-love.ru/greek_gods_and_goddesses_coloring_bookfcfsl.pdf
    • https://cdn-cms.f-static.net/uploads/4487184/normal_600dfa9384b3d.pdf
    • https://cdn-cms.f-static.net/uploads/4453885/normal_5fd2f823dc79f.pdf
    • https://cdn-cms.f-static.net/uploads/4427093/normal_604f730318e58.pdf
    • https://cdn-cms.f-static.net/uploads/4484356/normal_604fde3345e3a.pdf
    • http://zesamoa.online/piano_music_theory_cheat_sheetfzo51.pdf
    • http://samelike.site/ibm_bpm_8._6_installation_guidezhf2f.pdf
    • https://static.s123-cdn-static.com/uploads/4426549/normal_5fe0f8f0a7172.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8f56bd8f-131d-4f0c-b405-88ed9a650b3c/gofevapasusanimujas.pdf
    • https://uploads.strikinglycdn.com/files/d393ea1e-7853-4eb3-ae56-afa0a5510e43/devaxixiposesugisipani.pdf
    • http://wojepofikisad.rf.gd/71599224356.pdf
    • https://uploads.strikinglycdn.com/files/2b4598fb-4707-4cbb-8de5-7feb690e8185/zubufogusepakakofinoduvab.pdf
    • https://uploads.strikinglycdn.com/files/330d4006-3c50-4ad9-8863-7dd04b2d653c/good_career_development_goals_examples_for_teachers.pdf
    • http://xogowakowokavuw.rf.gd/what_causes_multiple_personality_disorder_yahoo_answers.pdf
    • https://uploads.strikinglycdn.com/files/f0732f39-dc33-4844-bada-998c4e159df9/toyota_rav4_2008_radio_wiring_diagram.pdf
    • https://uploads.strikinglycdn.com/files/93b2c83f-67b7-4591-bcec-f469debe24c2/nuviretesegup.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_off0000eb9a.bin
32f89fd90597e9dac0429b491d04fe24b766081cc6bd7eeaa75612f140131c97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9A 5432 bytes
font_01_sfnt_off0000fdf3.bin
344453e8c47b47a1018d94de181a732ce80ead50631a78aa946d49efaf54fa5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF3 10632 bytes

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