Malicious PDF — malware analysis report

Static analysis result for SHA-256 03868576cd7fd8c4…

MALICIOUS

PDF

118.0 KB Created: 2020-12-07 14:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: be533eda7e9229df689c70b62f5903bd SHA-1: 142885bee62e52a6b2ad3aa9de6783c1b989cdea SHA-256: 03868576cd7fd8c4010ceff274a70d46e01a5130ffb0710729e95f85409e13ca
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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://ggtraff.ru/aws?utm_term=arendt+we+refugees+pdf'. This URL is known to be associated with malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is sufficient evidence of a malicious intent, likely to lure users to a phishing site or download further malware.

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://ggtraff.ru/aws?utm_term=arendt+we+refugees+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_5f90b8b05c884.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/5062ed1f-e66a-42ef-8f6a-06a3b4d5b965/33024486250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fafeb3e-e1db-435b-8aa9-b540919311f1/paintball_gun_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58df85f1-8374-42ed-9c1d-adb220b29365/bofekixonoliv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe8e7aac-42c8-4e49-934b-bb79458318bc/sukhmani_sahib_path_reading_time.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf64b8eaf37e3b6493d3c2/1606378681724/81051127060.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5406c7d0c8f249d5d8b91/t/5fc827376652ad59ec1dc52b/1606952760227/the_sims_mobile_hack_ios_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1321e2e34347c7045f8f9/t/5fc862a113de6e79815915dc/1606967970417/lesifisuxoxeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc28c9de-9481-4567-a738-e9004ab4cf1a/truck_rental_60201.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f30fab89-2288-476d-a5a8-16bc750dcea0/gusaxifadupej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7752e72f-bb93-4363-81a8-f2b6d80cfc22/who_and_whom_worksheet_with_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf52a1cb3e0f5771462b89/1606374058748/the_catholic_faith_handbook_for_youth_third_edition_chapter_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca275e4d-4637-40e5-99e1-d19adbea591f/joxajuwifelezomu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe17922dd96f5918b68023/1606293395088/talk_talk_discography_free_download.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_off000193e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193E1 5048 bytes
SHA-256: 13a294485077b0e5ca65d4ebfd656bb11a89170e76a971c724366153bb1f952f
font_01_sfnt_off0001a53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A53E 11644 bytes
SHA-256: 904bdd8647eebb284753e2872200543f32c70934634d9246d175d8056048863d

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