Malicious PDF — malware analysis report

Static analysis result for SHA-256 311eefd736dff8b2…

MALICIOUS

PDF

84.8 KB Created: 2020-12-20 00:17:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cd181d2553a9cc5d18cae8aad8fd7432 SHA-1: a19b20eeedf13eb15a86abbe54089f9a690e54b6 SHA-256: 311eefd736dff8b2d52ef84777b0ade44e3b61a1bca8507f590754a90e0bd144
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely intended to redirect the user to a malicious site. No scripts were extracted, but the presence of the URL and the high confidence detection scores indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=christ+is+the+answer+church PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9765d325-e6f3-4a80-a86a-8f5be084b198/texas_conservative_voter_guide_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf00a9f-d88c-4141-beb1-501b40603b24/27904113701.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/anaganaga_oka_roju_telugu_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb87165-10a7-488e-a260-f244c8819dcc/37348595569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d1170c1-193c-4cc1-9593-54a8d90389c0/map_of_florida_springs_parks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58c3b530-13e0-45ea-93ba-609b0c0baafc/14040561163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/932497bf-42bd-49ce-9b47-463ef704e13a/mugejiloxuxanoleg.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/magojixolilumudosetifupax.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/10th_maths_question_answer_key_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28cf2b8b-7210-411e-b106-dd3c9879ed3a/noisy_cricket_2_in_stock.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10401 4744 bytes
SHA-256: f462dd7a1038902ca50822483005fddcc43a6924e2506dcc75a7ee337b91dafd
font_01_sfnt_off00011425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11425 10628 bytes
SHA-256: 300569e14fb895747c4a18b67044b96f51654284e691bcaa074560b06dbfcd02
font_02_sfnt_off00013886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13886 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176