Malicious PDF — malware analysis report

Static analysis result for SHA-256 89844885f89a0f15…

MALICIOUS

PDF

77.2 KB Created: 2021-05-01 02:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 155c36ec52395f2a9d9dfef226988218 SHA-1: db4dab5c124a4d93f417d4a22176ac89270d0fe7 SHA-256: 89844885f89a0f15cce994e9838fdd81d7c1052339a008b46a0d3b0baab89937
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to measuring ring sizes, directing users to a suspicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

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://seumenha.ru/strik?utm_term=a+guide+for+how+to+measure+your+ring+size+at+home
    • https://cdn.sqhk.co/sadinuko/igE1jfz/kujebakatevogedeganusunu.pdf
    • https://cdn.sqhk.co/junigofulum/ipLidjb/sonojukijanumi.pdf
    • https://cdn.sqhk.co/resozasevej/HhhUiax/naninejinixunajapepater.pdf
    • http://ruxuzosok.mywebcommunity.org/83482204959.pdf
    • https://cdn-cms.f-static.net/uploads/4451565/normal_606873e958120.pdf
    • http://gukevipagopu.mywebcommunity.org/73421884378.pdf
    • http://wipunemobak.mygamesonline.org/fezofupititepujud.pdf
    • http://pidagenavuziw.mywebcommunity.org/gujedalobezuxos.pdf
    • http://kitazixozakabu.sportsontheweb.net/wubatobineveme.pdf
    • https://cdn.sqhk.co/nozedimasav/fiehe8L/26980909297.pdf
    • https://cdn-cms.f-static.net/uploads/4456376/normal_6025583d79e08.pdf
    • https://cdn-cms.f-static.net/uploads/4462726/normal_601330111c290.pdf
    • https://cdn.sqhk.co/wogefosa/mH8FAvF/xilinufunejipo.pdf
    • https://cdn.sqhk.co/pigajifaw/higjhgg/how_to_knock_down_3_blocks_carnival_game.pdf
    • http://ruzamaji.getenjoyment.net/dupematugejowabiweripo.pdf
    • https://cdn.sqhk.co/toromerepowa/HPW0vgg/marketing_jobs_salary_entry_level.pdf
    • https://cdn.sqhk.co/kuwusemob/D8ifij3/27208998277.pdf
    • http://fonivoguko.medianewsonline.com/journaux_algeriens_en_franais.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/014ee609-58c5-4a2e-b3d7-7eea8d5f1a06/22998712780.pdf
    • https://uploads.strikinglycdn.com/files/727c1a22-19f2-45b6-b369-1e683b7af32b/zomemomigux.pdf
    • https://uploads.strikinglycdn.com/files/1489384e-bd6b-4d62-8973-4edbfe4ee8e1/gekajatofojizar.pdf
    • https://uploads.strikinglycdn.com/files/b063c6df-aef9-4adf-a1a0-ec58137e7e90/30620796336.pdf
    • https://uploads.strikinglycdn.com/files/f3a5c8a8-4d02-47d3-801a-e96ab67dbf94/albacore_tuna_price_per_pound.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_off0000eeab.bin
8a9ec85f8ff967fd1fb16efcca8da273f145928eb690f42abd3792775202ba3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAB 5520 bytes
font_01_sfnt_off00010168.bin
82b331cb75e034145923c2e2bda4a958bd5bf8efd15eb9bfd9f61f5b2812f0ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10168 10956 bytes

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