Malicious PDF — malware analysis report

Static analysis result for SHA-256 268fbd6864ffa35c…

MALICIOUS

PDF

92.5 KB Created: 2021-03-31 01:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcc477e62d682002a9b5e176545e6044 SHA-1: a3465a2eeac0b1ba0ebb4d4cd7ffe72af2c9ea86 SHA-256: 268fbd6864ffa35c5c214786bb693fc49884a9da8b5237401e5a630b6370d5dd
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, zajinet.ru, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to a game, suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://zajinet.ru/wix?keyword=azur+lane+how+to+get+retrofit+blueprints
    • http://vasugixoba.22web.org/java_vm_windows_10_32_bit.pdf
    • http://creditreportus.info/wufuvira8697g.pdf
    • https://xisofapetuv.weebly.com/uploads/1/3/4/7/134747578/kisofigiked_ranigafo.pdf
    • https://xaroduzorosu.weebly.com/uploads/1/3/1/3/131398324/d992e7c4973.pdf
    • http://fastgetme.online/20462422337b5nfu.pdf
    • http://molotkov.site/39912162807lbgia.pdf
    • https://xilasofuvi.weebly.com/uploads/1/3/4/6/134651230/1f00632621.pdf
    • https://saxepuxuk.weebly.com/uploads/1/3/4/4/134472003/7750216.pdf
    • http://excellent-spb.ru/69338068351hjdnx.pdf
    • http://wusodopepufex.66ghz.com/address_book_missing_in_outlook_2016.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/semuxemakaw/tokoxusegivutipaxawa.pdf
    • http://fafovinipola.epizy.com/64928459749.pdf
    • http://fefaborap.rf.gd/short_moral_stories_in_hindi_for_class_8.pdf
    • http://niziziv.epizy.com/acids_and_bases.pdf
    • http://zasojogukumor.rf.gd/6172241100.pdf
    • http://fibejebovef.epizy.com/yiboo_helicopter_parts.pdf
    • https://s3.amazonaws.com/bubodeliza/arterial_blood_collection_procedure.pdf
    • https://uploads.strikinglycdn.com/files/94530140-00c0-4db2-a3e1-fe7937afe620/what_is_visual_in_art.pdf
    • https://s3.amazonaws.com/bifamomove/73631998859.pdf
    • https://uploads.strikinglycdn.com/files/92224803-c698-4899-b0fe-70b50c6ea8e7/rujus.pdf
    • http://kilibuv.rf.gd/commercial_aviation_safety_4th_edition.pdf
    • https://uploads.strikinglycdn.com/files/33f11f12-a959-4cdc-91fb-c3d44d38467a/do_furnace_pressure_switches_go_bad.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010428.bin
df229678e080cd06e9b405cf4085dd7a5fb669e29dbb75b534105b6243512a6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10428 4512 bytes
font_01_sfnt_off000113b5.bin
541528da04ace76bb3daf26e7045e1d114bf19a63b45fcd07b5397d2a1113937		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113B5 5432 bytes
font_02_sfnt_off00012649.bin
f1dccae0d20cf3d54b0b2a4364b050d7307606c5b13e1e47f56e973eda4cea16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12649 12100 bytes
font_03_sfnt_off00014ee9.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE9 16092 bytes

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