Malicious PDF — malware analysis report

Static analysis result for SHA-256 a709d88b26658c34…

MALICIOUS

PDF

66.1 KB Created: 2021-03-20 00:51:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 205d2a65a8a38a32a21f8f3e3d51ca2e SHA-1: 7b96b00b78843ba12f02d74abc67b6bb2fc3197f SHA-256: a709d88b26658c344b10fd13a9632413adf423cb72dd26bf6457a509ad84c063
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 URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to an art activity worksheet, intended to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://jumiwimov.ru/wix?keyword=fingerprint+art+activity+worksheet
    • http://kefets.xyz/dilifetudagepumegow4u5rs.pdf
    • http://alex-chekalev.com/scd_in_ssis_tutorial_gateway1b0q7.pdf
    • http://chambreapp.xyz/mibazopesasavuxofejafivo3hlgr.pdf
    • http://microbladingcertificationdfw.org/pujosolosufilavusijotb0mp.pdf
    • http://gazizelasama.getenjoyment.net/cuales_son_los_pronombres_relativos_en_ingles_y_espaol.pdf
    • http://waliduv.mypressonline.com/48035376061.pdf
    • http://instas.site/58320087446vneyr.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_4fd77a8666d446c2866943af5a626989.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c9feb1a6-2d71-4b6b-920a-a3d696519ed7/loputasok.pdf
    • https://uploads.strikinglycdn.com/files/c3ffc6cd-c389-4229-b298-ab431dd42cc4/40345239298.pdf
    • https://uploads.strikinglycdn.com/files/ad8e1c5b-d70f-4a90-a182-4056fa2853af/the_grand_grimoire_hardcover.pdf
    • http://koradanizepagow.myartsonline.com/antiphonale_romanum.pdf
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_dd80eb1784904cfaba8970531f5d3030.pdf?index=true
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_5a9dfebda4d14f768b9d44b38f9e7b58.pdf?index=true
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_3771c655cfaa4e59a0bf4c4cda84cf2d.pdf?index=true
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_0f3281e787f9491a8b173bb87b21f5ac.pdf?index=true
    • https://uploads.strikinglycdn.com/files/11b9b659-e8ac-48da-bdae-601604410a63/60383498509.pdf
    • https://uploads.strikinglycdn.com/files/fdb047b3-e9f0-4654-8dce-feca9403c984/88747543926.pdf
    • http://fataragoreb.myartsonline.com/jung_red_book_illustrations.pdf
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_6e6b599639f9468f92f03cd7ffe7bc44.pdf?index=true
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_c0077a42782a474dbc2a2f78ea76cecb.pdf?index=true
    • http://vakogez.myartsonline.com/luxuduvelagowepape.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_off0000c578.bin
bfbf6c87377b3042ceab2eb93ff9396360f451b002c15f0e6ec6e5a864ac3eb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC578 5436 bytes
font_01_sfnt_off0000d817.bin
1e42a6eb464a0e223036696dcbeaf55a8608e24a9e34db7b2685c53dee0fb68c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD817 9848 bytes

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