Malicious PDF — malware analysis report

Static analysis result for SHA-256 d292a8dd34e1932e…

MALICIOUS

PDF

83.2 KB Created: 2021-05-27 05:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 122833a3e3c7d22377292a27b87c2d8b SHA-1: d2507c3bfbf25bc43ffb259501b8f2454d581c1b SHA-256: d292a8dd34e1932e35547468d835d7551b84091f9c0d687fbc6cfb3764b71fb6
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/strik?utm_term=what+is+the+purpose+of+recrystallization+of+benzoic+acid PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474750/normal_602f41a3cec50.pdfIn PDF document text
    • https://zozolesib.weebly.com/uploads/1/3/4/6/134631165/rovojopaga_lojizatoxi_kanowita.pdfIn PDF document text
    • https://pibubeje.weebly.com/uploads/1/3/4/3/134374065/6736363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375341/normal_6049d3576c898.pdfIn PDF document text
    • https://niritamin.weebly.com/uploads/1/3/4/4/134486676/3766873.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370540/normal_5fe0f1db5479f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490724/normal_5ff8f1cfcdf70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457005/normal_6061af7123634.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443814/normal_5fcaad1a2aecc.pdfIn PDF document text
    • https://venonaneguwar.weebly.com/uploads/1/3/5/3/135398509/6aeedb42ca8.pdfIn PDF document text
    • https://piwaxiru.weebly.com/uploads/1/3/4/8/134882920/4577488.pdfIn PDF document text
    • https://tedovuja.weebly.com/uploads/1/3/4/4/134465286/d42c7b99496f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403937/normal_600651bf08308.pdfIn PDF document text
    • https://lijoliwaxodoxi.weebly.com/uploads/1/3/1/3/131398144/xalokomoge.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/8aecb533-9072-4495-a6f9-6759742a8849/how_to_draw_anime_girl_step_by_step_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f20f876-f918-4179-b45c-513b8d571a73/tubidy_music_app_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7723fff9-37f8-468c-bf38-83babcd8602f/26259853535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6322225b-398b-4c75-b368-cbef15e7f387/whats_the_theme_of_orbiting_jupiter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd34f7dd-c27b-4e3d-ac9d-5b7d023ca9ec/ingenuity_swing_and_rocker_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbea41e-598a-4db7-b421-3cbd53c1c568/xuwaxaxenekirumarurawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10fe2f2e-9114-4660-8659-575561add32b/96737011797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e846fc9b-7539-4695-b1f2-fb68fe882611/31506059547.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF078 5548 bytes
SHA-256: a444f2eeb3a2bcc99b77672a307c24e324f6b7d8067a3c7490e26754c659862e
font_01_sfnt_off00010366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10366 11272 bytes
SHA-256: 174d1571e9a858a925483e7b3cb45d2046b773b5d507ba2a67cbdbd0280b4fc3
font_02_sfnt_off00012a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A40 16060 bytes
SHA-256: c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c

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