Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b86bc6abaa655a…

MALICIOUS

PDF

94.4 KB Created: 2021-03-19 03:40:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 21bdaf6aa50acae4b6aeeb8a1eae10f6 SHA-1: 341a45ca88c6989f7a8efafd9b0706246d952dd3 SHA-256: a3b86bc6abaa655ad32d456e97cbf496611e59e7d9d8398e1f38f5d5563f42cc
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to 'ventilator settings', likely intended to trick the user into visiting the malicious link. The presence of external URIs and the ML classification strongly indicate a phishing or malware distribution attempt.

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://pelibifir.ru/strik?utm_term=how+to+report+ventilator+settings PDF link annotation
    • http://jimefat.22web.org/gijosowetanunejo.pdfIn PDF document text
    • http://kaxazul.iblogger.org/background_check_authorization_form_for_employment.pdfIn PDF document text
    • https://vufofameti.weebly.com/uploads/1/3/0/8/130874118/29aac.pdfIn PDF document text
    • https://ketetigowuvulon.weebly.com/uploads/1/3/5/3/135396667/polalagarulitufewes.pdfIn PDF document text
    • http://lasofetuxig.22web.org/vocal_remover_software.pdfIn PDF document text
    • https://tutitobogin.weebly.com/uploads/1/3/4/4/134485970/7692832.pdfIn PDF document text
    • http://wedudixunuluwef.iblogger.org/55206665391.pdfIn PDF document text
    • https://lareduna.weebly.com/uploads/1/3/1/4/131453109/2607047.pdfIn PDF document text
    • https://buxipowuno.weebly.com/uploads/1/3/4/3/134353207/6083382.pdfIn PDF document text
    • https://lujotasapamuxa.weebly.com/uploads/1/3/0/9/130969194/ditavemupasu.pdfIn PDF document text
    • https://ziperivowupidu.weebly.com/uploads/1/3/1/3/131381589/lavadigufi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pidufozu/bujakenoli.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/mimaduxirufipukolipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab81689-7eef-488e-af52-ad4feb83d571/para_que_sirve_turmeric_en_capsulas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58c2574b-a560-46f7-a00e-04ea990df168/33353827552.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/vaigai_express_platform_number_in_chengalpattu.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/indian_air_force_exam_paper_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/357964936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feb72753-a9bc-4ef1-b7e3-4534e9564777/26354440282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85d6b2d0-e233-4c1f-95c5-54aee5187367/tree_trunk_coffee_table_legs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd00f5bc-64e2-4d62-b921-63b50fda5490/93009792864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f9008f-b363-4974-877b-dfb407baf51f/212_degrees_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e4c8891-1d21-4b9e-adb4-166d005f1b31/99695144322.pdfIn PDF document text
    • http://kunubuxeduw.epizy.com/fluke_fishing_nj_reports.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13162 5100 bytes
SHA-256: 4e72d4722fd62d95afda781b8b9fcb603d94109684d4c7271548b7a0dc515a23
font_01_sfnt_off000142e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142E1 11708 bytes
SHA-256: 9fcbb220b50dc9dbfdc2ce6eeaa7b916fa64991f240b8ff01f65279dc827fb85

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