Malicious PDF — malware analysis report

Static analysis result for SHA-256 050b53d18c00fe55…

MALICIOUS

PDF

115.1 KB Created: 2021-01-30 07:50:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dd1818fa2f261a3c584627fa4a8b6bf9 SHA-1: ba86df900aa3d6744f810fae69a3a5bfb4d9292b SHA-256: 050b53d18c00fe5563233fd2cd5c5a7a5173d3953e3bbe11855e5bd803bc9aec
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/wb?keyword=encyclopedia%20dramatica%20offended%20song'. This URL is known to be associated with malicious activity. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and the malicious URL indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/wb?keyword=encyclopedia%20dramatica%20offended%20song In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421473/normal_5fd1ecf4ba685.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455403/normal_600577b683ee3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426699/normal_5fc749b9a6729.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448343/normal_5fcb77b6e3b9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5fdb1eccbea6f.pdfIn PDF document text
    • http://homiak.fun/amazon_music_prime_coston9b56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402250/normal_5fe06efecd1d3.pdfIn PDF document text
    • http://vereffka.xyz/allegiant_movie_part_2_trailerlt414.pdfIn PDF document text
    • http://skidki-day.store/52784859408dg96n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392877/normal_600fa4970f0f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450434/normal_5fd9022edaa6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481170/normal_600da7880eeec.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/toguvaju/zukubu.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/platform_advertising_defined.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/astrocytoma_glioblastoma_multiforme.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/99268941228.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/asche_abar_shabor_full_movie_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/consolidated_balance_sheet_example_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/application_letters_format.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001879a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1879A 30868 bytes
SHA-256: 8612390d819a9eda04782347ecbd9b4f27fb5e6ea2ed8bd468b8e88ea0c7a12f
font_00_sfnt_off00014bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BF1 5532 bytes
SHA-256: 09232d0535c5fe76682e4992ed7df6bbe05a352508c04d3487b6aa5f188e9fe4
font_01_sfnt_off00015ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EC2 12020 bytes
SHA-256: 95871e89b825c7c4a1489287d8b8d8c21a4d86eb5046b66fc6db22fd308b1803

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