Malicious PDF — malware analysis report

Static analysis result for SHA-256 c85e7b9305b0d6a6…

MALICIOUS

PDF

78.3 KB Created: 2021-03-29 13:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d40dbba4151eccdad59b636f030d8d9 SHA-1: efc7168f859b5462c6cb12ab0221a22c5bb2b949 SHA-256: c85e7b9305b0d6a64dc4d4c7678f7571505edbac4da4cc956cdee7a5a84bf5aa
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/wix?keyword=minecraft+cheat+engine'. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The document body, though heavily obfuscated, suggests a lure related to 'Minecraft cheat engine'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/wix?keyword=minecraft+cheat+engine
    • http://xoxapepagaxon.mypressonline.com/geological_map_of_rajasthan.pdf
    • http://pasikufopubiwo.mypressonline.com/74860972280.pdf
    • http://goduvide.22web.org/fisipowememidediduvabut.pdf
    • http://tulumiv.medianewsonline.com/the_ugly_duckling_full_story.pdf
    • http://dumigegin.medianewsonline.com/hallelujah_easy_piano_free.pdf
    • http://wirajamosilun.22web.org/barcode_examples.pdf
    • http://puxeguka.iblogger.org/2150031650.pdf
    • https://nirefuriwubava.weebly.com/uploads/1/3/1/6/131637308/db471b459b.pdf
    • http://finuxezanasa.mygamesonline.org/14649336726.pdf
    • https://ranatugirebulox.weebly.com/uploads/1/3/4/0/134017659/famurosugorifud.pdf
    • http://vawabipoxe.sportsontheweb.net/carrageenan_properties.pdf
    • http://jaralet.getenjoyment.net/jezup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fadowudi.rf.gd/pre_marriage_counseling_certificate_template_free.pdf
    • http://bodegifu.atwebpages.com/bakunin_on_anarchy.pdf
    • https://s3.amazonaws.com/lixuduwonifa/what_is_technical_writing_communication.pdf
    • https://s3.amazonaws.com/jidagafinuxesu/pellon_fusible_midweight_interfacing_instructions.pdf
    • http://sadozejeko.myartsonline.com/cashier_interview_questions_and_answers_free_download.pdf
    • http://xediguvodolej.epizy.com/phonics_alphabet_chart.pdf
    • https://92e0cadd-ca3c-497d-ba7d-1aece6ee6da0.filesusr.com/ugd/008e52_b20a840e15be41ce9c0dddeb2bde1c2e.pdf?index=true
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_8d571ded40734398b3037f673ecb4c41.pdf?index=true
    • http://nejimafalun.onlinewebshop.net/sixatuniruxosegiru.pdf
    • https://s3.amazonaws.com/rimepusox/pagasevitavobimew.pdf
    • https://s3.amazonaws.com/dudujopixejikug/baby_bassinet_sheets.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_off0000f707.bin
5473efac767fba7e06ee0351950f5e9567e5351bb652e29d0ff78c85ac9d2c57
pdf-font-stream PDF embedded font (sfnt) at offset 0xF707 4940 bytes
font_01_sfnt_off000107e1.bin
78365a8f8320e37f774ceae94c355193a93a8d0ea762251efc15b6c489c90d7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x107E1 10808 bytes