Malicious PDF — malware analysis report

Static analysis result for SHA-256 d58d64b982747c01…

MALICIOUS

PDF

68.8 KB Created: 2020-11-16 12:34:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6969d81f049172cdcd744b87a2e21f4f SHA-1: f92fb9b57e597281d0c274c9a0d119a8db7288fe SHA-256: d58d64b982747c0159b46005be8fb5c59b5dfbc746a16aa7d76e07e9d96495f1
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an external URI and embedded URLs, with a high ML score and ClamAV detection confirming maliciousness. The document body, though heavily obfuscated, suggests a lure related to "Beer run lyrics", likely intended to trick the user into visiting a malicious URL. The presence of embedded URLs and the nature of the detection point towards a phishing or credential harvesting 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://trafftec.ru/123?utm_term=beer+run+lyrics PDF link annotation
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/gafupuzepaxitevero.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/fizasolunajik.pdfIn PDF document text
    • https://nibuwoxemunovox.weebly.com/uploads/1/3/4/7/134714338/c6cdbbe7a8ba.pdfIn PDF document text
    • https://nezuwiwobitedut.weebly.com/uploads/1/3/4/6/134600585/35256b5795e9658.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/xibebaje-morebadekedazu-vofubotegisi-notune.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/2cbe8246-1e7a-4fbe-b862-899db213fdec/worksheet_4_the_composition_of_blood_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/431c9d45-3f2e-4652-bcbb-1c5327dfb865/20651075288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f1fab5-433e-4668-86b3-70ce935eddcc/dominion_power_ebill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c29978b-0f46-459f-ad7c-cef6d173a994/del_miedo_al_amor_jurgen_klaric.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a9670c0-16f3-4413-bf59-b6dc22f6b4c5/go_math_grade_1_teacher_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/denulibikurejebuvigugefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dba98ed-2f57-4a23-bb4c-ecbf37d7359d/jomejisenozita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b82719a7-a462-4d45-81e5-083050983d71/81764005703.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/62677670714.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_off0000d408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD408 4732 bytes
SHA-256: fb5a6247907901de52c28c4c5ec493e024f661abf4189c89d39214c894a39795
font_01_sfnt_off0000e43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43B 9972 bytes
SHA-256: 06e81dab09e99ef5346393666c99f12bc55d61ca55f3b5a70af35623a766fa17

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