Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40d8f319592d763…

MALICIOUS

PDF

178.0 KB Created: 2021-04-04 04:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55ad19cdc64c8882e201a1149a6c63b3 SHA-1: dbaa0e04a12975a2b30ddbebdf36d26b3b540767 SHA-256: a40d8f319592d7632bee706fb2796ed0261e0f64e2505e8b8e784df313d22e40
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF document flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly indicates the document's content is designed to deceive users with promises of prizes or funds, a common tactic in advance-fee fraud. The embedded URL `https://jottigo.ru/strik?utm_term=on+the+origin+of+species+%2528tamil+edition%2529+pdf` likely serves as the initial point of contact or download for a malicious payload, aligning with the 'Malicious Link' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://jottigo.ru/strik?utm_term=on+the+origin+of+species+%2528tamil+edition%2529+pdf
    • https://cdn.sqhk.co/poronujefino/LBHjcig/optical_illusions_gif_high.pdf
    • http://lovelyhouse.online/86263237007ilssl.pdf
    • https://cdn.sqhk.co/resozasevej/agdtijP/db_train_simulator_online_crazy_games.pdf
    • http://tradestaroffice.com/9775726567139hd8.pdf
    • http://recepty-dd.info/bojonomxmqun.pdf
    • https://cdn.sqhk.co/lomekojop/geSWR4b/zipumakezedu.pdf
    • http://7lessons.space/asbestos_sheet_weightmt70t.pdf
    • https://cdn.sqhk.co/dopiporajen/c5Iibgf/kefev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7460a0e9-0278-4bc0-81f7-035c7165da4b/66303763421.pdf
    • https://s3.amazonaws.com/vaxebisapesi/blackberry_android_privacy.pdf
    • https://uploads.strikinglycdn.com/files/231d406a-d0f2-4a6e-838d-41415e3785e7/818276186.pdf
    • https://s3.amazonaws.com/setigafat/fewumegulumarawepumujo.pdf
    • https://s3.amazonaws.com/kewakuko/kugenawajuzowubobo.pdf
    • https://s3.amazonaws.com/wiwamoxamo/54988816497.pdf
    • https://s3.amazonaws.com/fajixe/55556797005.pdf
    • https://uploads.strikinglycdn.com/files/aeda146d-f6c2-417c-bb8d-8ff6c77a0ced/wazovowatefuwukorutop.pdf
    • https://s3.amazonaws.com/sivanira/50506447329.pdf
    • https://uploads.strikinglycdn.com/files/854ac0ee-1516-4cc4-9c78-924e11cb25c6/strategies_to_teach_reading_to_students_with_dyslexia.pdf
    • https://s3.amazonaws.com/turip/wupizipigulunupafoteba.pdf
    • https://uploads.strikinglycdn.com/files/d597baea-22e8-4b2b-852b-ccfc9ea9f9bb/91887669859.pdf
    • https://s3.amazonaws.com/juliziwojatige/18088644941.pdf
    • https://s3.amazonaws.com/vavejijitatofu/55936318394.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_off00027d6a.bin
6f9c737814ecd2a4f4c53e8e441f5df9aa06ade72cafae6104799e6c664bc94b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27D6A 5748 bytes
font_01_sfnt_off000290e4.bin
99d995938676f5ef748d73a626d71bcdcb2cf8395b883d85de46b1059547fe15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x290E4 12652 bytes

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