Malicious PDF — malware analysis report

Static analysis result for SHA-256 7962a9a83fb154f8…

MALICIOUS

PDF

73.3 KB Created: 2020-12-28 20:58:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: b3ec5b477546d3a3dcf1551bfa3ca79f SHA-1: 92232b1b8b394a41e4e74594e66cd47c4468c97d SHA-256: 7962a9a83fb154f8e4bbd2ab9a29aa57e28ebb5833ceb88c85096d8bf687b07f
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://traffmen.ru/aws?utm_term=oracle+12c+dbms_utility.+format_error_backtrace'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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://traffmen.ru/aws?utm_term=oracle+12c+dbms_utility.+format_error_backtrace In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373271/normal_5fbb0bfacea17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369774/normal_5fb85db758874.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/e115e978-ccaa-4db8-b11e-578a2d1ef489/litinixemexisizibatebidex.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/avarampoo_movie_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/juziporumuvuner.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/2010_cbr1000rr_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/sovipuwawiru.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/bikewemulesabeximewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64d2d32c-7e7b-4ac0-876a-6a24e886aa87/36041988303.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/rawutoji.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/22736673369.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/99220639300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1003dfb0-f9bf-4860-86e7-2865eb5bbf81/97041541135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84d0f95e-3ec3-4148-8b9b-a115518c4682/music_theory_for_guitarists_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b91507b-2cca-4d51-819a-d0b781ad2f11/pixaxugun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/423d8868-e075-4388-813c-11f8009d5f31/map_escape_from_prison_jailbreak_skins_export.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_off0000d8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EA 5744 bytes
SHA-256: 1f10f18650f8bc62eda29d083c9bef093be46265ecda8592082c76962c6cc61a
font_01_sfnt_off0000ec79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC79 13980 bytes
SHA-256: b0ac555f11a7f307f4b8b75def4019bb5e0988c3370c3f88ccfcc188f1b6b105

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