Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e8524633ef4064a…

MALICIOUS

PDF

96.0 KB Created: 2021-04-25 00:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31afd322ece580265670321d29dc79d3 SHA-1: b41b37fe1918a40ff6797b37f1eaa816940d9f7f SHA-256: 7e8524633ef4064a23c9c0b05db0a6418a880d9c7d20afe62ebd38072e229933
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, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to data analysis, aligning with a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/strik?utm_term=how+to+analyse+data+collected+from+observation
    • http://ibkreactiva2020.com/93275756142ebxxj.pdf
    • http://re-capital.ru/66233752479yl1ki.pdf
    • http://optamorem.com/41982545230x2ucc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/871344ca-49c6-4b20-a7ee-716f0ebca6ec/factoring_trinomials_a_1_lesson_notes.pdf
    • https://s3.amazonaws.com/kewakuko/the_shining_remake_movie.pdf
    • https://uploads.strikinglycdn.com/files/1f2ea6ac-a26d-48c6-a561-054a36037ff0/xapelixat.pdf
    • https://uploads.strikinglycdn.com/files/8338a242-1724-4f6e-b931-dc373f202ff9/what_are_the_two_main_tools_of_fiscal_policy.pdf
    • https://s3.amazonaws.com/bisiku/nirepimenisu.pdf
    • https://uploads.strikinglycdn.com/files/3e88638e-b7cb-48ef-b919-582e006ad025/doll_house_kits_and_furniture.pdf
    • https://uploads.strikinglycdn.com/files/010e1868-bdc9-4725-9518-19d07a6bf41b/best_spas_to_visit_in_february.pdf
    • https://s3.amazonaws.com/borokegujuzero/92220367510.pdf
    • https://s3.amazonaws.com/mojivikapeti/nebifosevovajuzosopig.pdf
    • https://uploads.strikinglycdn.com/files/eec45bec-2b69-4587-a6ef-4c9ce02e89ba/maytag_5000_series_washer_f21_code.pdf
    • https://uploads.strikinglycdn.com/files/7834b41e-60b5-46f2-9a37-602d3471dda3/66058011299.pdf
    • https://uploads.strikinglycdn.com/files/47e8fff4-cebd-4cc2-af05-2c85d84477ff/vijulasijufibo.pdf
    • https://s3.amazonaws.com/vidadaviwal/99838523509.pdf
    • https://uploads.strikinglycdn.com/files/88d05c0c-4777-47ee-b434-375346c40db2/how_long_will_a_kinetico_water_softener_last.pdf
    • https://s3.amazonaws.com/mikibetiv/1506469580.pdf
    • https://s3.amazonaws.com/zesotat/24231220778.pdf
    • https://uploads.strikinglycdn.com/files/9a590e6c-cdbd-4d53-997d-66549baf68dd/mouawad_1001_nights_diamond_purse.pdf
    • https://s3.amazonaws.com/tadevewuju/the_warriors_book_sol_yurick.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_off00011651.bin
348035f94a806c680ea7600e1f511b81e6cb5a533a9d2dda70a42246c856f2ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11651 5312 bytes
font_01_sfnt_off00012863.bin
33964b28753c6bc0410752beafb0076f7fe435ea75e0ba4ce99149676a2b70cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12863 11192 bytes
font_02_sfnt_off00014e9d.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E9D 16204 bytes
font_03_sfnt_off000163ca.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x163CA 4324 bytes

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