Malicious PDF — malware analysis report

Static analysis result for SHA-256 809c207b96953f54…

MALICIOUS

PDF

77.4 KB Created: 2021-03-09 08:33:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c010dd86c4a1914196c398345e494eb6 SHA-1: 5b5be1ec2e213133c2e73cea706a6dd609320030 SHA-256: 809c207b96953f54001fa55c1b344a67e0576332f1a0a287c6257c3d90729acc
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a suspicious domain, likely a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'similar triangles review pdf', which is likely a pretext to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/award?keyword=similar+triangles+review+pdf
    • https://cdn-cms.f-static.net/uploads/4386609/normal_5fdba4ebcb1d2.pdf
    • https://cdn.sqhk.co/bidekidarub/jNEhbjd/wejadawagiboz.pdf
    • http://vinuporabomod.iblogger.org/42345094504.pdf
    • https://cdn-cms.f-static.net/uploads/4406806/normal_60374602577bb.pdf
    • https://cdn.sqhk.co/baxewoxevum/jdM6ieZ/fenoxobu.pdf
    • https://static.s123-cdn-static.com/uploads/4443617/normal_5ff757ce2c766.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/88bd914f-f2f3-45f6-a8a3-f4f1d08cfa80/88405322385.pdf
    • http://salogun.rf.gd/lovubiwiwito.pdf
    • https://uploads.strikinglycdn.com/files/3cb18ebe-13bb-4fdb-92e8-209c4f798cd3/64378158692.pdf
    • https://s3.amazonaws.com/pululusodogi/lagu_karaoke_avenged_sevenfold_dear_god.pdf
    • http://pufagaduvamoj.rf.gd/10485975491.pdf
    • http://poluxik.epizy.com/rukanulopebum.pdf
    • https://s3.amazonaws.com/fusopoxipo/towejurugowuzunibuninor.pdf
    • http://kunuwinafedib.epizy.com/gw2_weaponsmith_guide_0-_400.pdf
    • https://uploads.strikinglycdn.com/files/d8cf266e-14e6-4c7b-ad92-fa8d22acdcd5/80049439426.pdf
    • https://uploads.strikinglycdn.com/files/785d2b73-b2e6-41b8-b4d5-b83eb18cde03/kejugur.pdf
    • https://uploads.strikinglycdn.com/files/176f0df9-78f6-49d4-89d1-a8db4d985508/isaac_asimov_foundation_series_book_order.pdf
    • https://s3.amazonaws.com/suxuzubojut/broadcast_receiver_service_android_example.pdf
    • https://uploads.strikinglycdn.com/files/34bf9c58-32d9-4185-8111-88d4867e18a2/how_to_write_a_statement_of_faith_for_employment.pdf
    • https://uploads.strikinglycdn.com/files/e780a619-d8d7-432b-b3a0-2f2be9531934/jasopevedulizat.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_off0000f1a2.bin
2fb40e926f5997a64aec8f64f020299705e6a17e684348b995b8b3f7916404a5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A2 5616 bytes
font_01_sfnt_off000104b9.bin
46fd6c2d683602248977ccf5a67397cf379bdece7b6457134732a67488e476a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x104B9 10488 bytes