Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6909e5c5e82289…

MALICIOUS

PDF

76.7 KB Created: 2021-05-23 07:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7987e72ef5ea9d35a3eae04e0fbf1fa9 SHA-1: 1d74819634c90639c6a29f868a2a40380c8dd538 SHA-256: 7d6909e5c5e8228921f6961627c934c92e445e743ccbf1efe22792a71c2290d1
96 Risk Score

Malware Insights

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

The PDF file contains a suspicious URL that is likely used for phishing or malware distribution, as indicated by the ML classifier and ClamAV detection. The document body, though heavily obfuscated, contains text related to song downloads, suggesting a lure to entice users to click the malicious link. No scripts were extracted, but the presence of embedded URLs and the overall malicious verdict point towards a phishing or downloader attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=soniye+hiriye+teri+yaad+mp3+song+free+download+songspk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488570/normal_604f5edf3cc40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_6068cd7831ea1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502920/normal_6006bc327117c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499635/normal_603030053722b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408996/normal_6025af1a863ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378383/normal_602c64b8d243e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_6062bf229d302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449622/normal_602a125586290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454055/normal_604fa18bf3492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446914/normal_6056776b9a7a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463794/normal_6066b0389b19a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451766/normal_5fce6a3c2c1f2.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/lomogas/bromination_of_phenol_chemguide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c5c9dd-d28e-4eea-90aa-33f23ea1b1aa/13046209984.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/nofokolowevak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3508f7a-4489-45c9-afc4-0cec188ed5c5/what_is_a_gs_15_equivalent_to_in_military_rank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04a592cf-2958-42fb-8558-fe42ba6e35d0/jawir.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/kuta_software_finding_slope_from_a_graph_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16a6bd2-938f-4af6-ba98-f8da0fcd64d7/59036553796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a288d5-6c7d-421c-93f1-1501d74834ca/18660256241.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/xanurufajilumuwe.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_off0000e881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE881 5980 bytes
SHA-256: 24ae2adcee038fc2d29c4297160628bee62a03e2cfeeab004d39fe11caa56b2a
font_01_sfnt_off0000fcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD1 11252 bytes
SHA-256: 7382ead7b0c362c04a781c1eb2c11ff5974b850a9e8ab82b7077b962199a9f61

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