Malicious PDF — malware analysis report

Static analysis result for SHA-256 44624851b7baec4e…

MALICIOUS

PDF

71.3 KB Created: 2020-11-10 09:03:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 212f0872f8a46700b8180042369820b3 SHA-1: 8ef29c153c46dfd5f77d09676f0aee52e3779571 SHA-256: 44624851b7baec4ee19e676546ed342362caf6902d2364c2cec2d03e651f9e04
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to a suspicious domain, which is likely used to host or deliver a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a 'Macbeth study guide'. No scripts were extracted, but the presence of an external URI and the overall detection profile indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/aws?keyword=macbeth+study+guide+act+1+scenes+1-4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421058/normal_5fa1430931492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393349/normal_5f90a2374a82f.pdfIn PDF document text
    • https://rabidibizuzej.weebly.com/uploads/1/3/4/6/134648686/450b1b3.pdfIn PDF document text
    • https://jumolixebeze.weebly.com/uploads/1/3/4/3/134352805/3600594.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/72244ac8-ba13-49de-93b9-4cf5138bb4f0/86718617643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0fa8867-e02e-42a8-b167-0097d5833a85/soenix_unblocked_games_uno.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/eihc_cedar_rapids_ia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b355007-8cb6-486b-9c49-f66036242e38/juror_subpoena_failure_to_respond_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6e0b5a8-605b-42bd-8539-327c103d600b/17490705191.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/avenza_maps_review.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/putoditunibimev.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/nafew.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/giwole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eabc92b3-4742-4942-92a1-9a20cf2a951a/78416030578.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/kabikinepakobofeju.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/things_that_start_with_pop.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_off0000d9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FD 5492 bytes
SHA-256: c9eb30812131f933da8ec9f3a8013dd29454ccac6fd1d2ea7152ff285456d489
font_01_sfnt_off0000ecca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCA 10752 bytes
SHA-256: 48c412238c64e423cf419186b3fefeaa4ad44bdb8273082f8c6000691be8125d

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