Malicious PDF — malware analysis report

Static analysis result for SHA-256 40a2254b8df07326…

MALICIOUS

PDF

77.4 KB Created: 2020-12-01 05:20:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 86eeeb1d1e8e44cad898a9a51a882b79 SHA-1: 2f94888b6d53bddb4be6ffaff15783c1add165a9 SHA-256: 40a2254b8df07326e1381ffe31afc838a7d1cfee86bd9f86e85ffc5df813ae9f
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • 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/123?utm_term=visual+studio+2012+express+keygen+download In PDF document text
    • https://viziwebaf.weebly.com/uploads/1/3/3/9/133999863/2961413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471969/normal_5fb299cfc2d10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376857/normal_5fa940a605c8c.pdfIn PDF document text
    • https://nimifitirujaga.weebly.com/uploads/1/3/4/6/134693460/dukepidagoweduj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2a81ee5c7695ca9a6fa19/t/5fc3f6d118e72e5fdb52bf51/1606678226066/48_hour_xbox_live_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16dbdd8c-47cb-4f1d-b649-c6f5a02d4fc3/bubavosowudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/238f53f4-ec17-48a5-a072-9925f4a03302/19179142528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17faaf9d-4428-473d-ac15-c03aa8199205/gibumonoxatipew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dadda33c-23f4-4bc1-86a7-f4ad2f242f25/the_bourne_supremacy_download_in_hin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc326f27848ba205d273b7f/t/5fc5a95f4f98375720a22b4b/1606789473688/piroma.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdeed01972c46e3c6420e7/1606282961499/ski_doo_repair_manual_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf8fabc819f1cf49e5a3f/1606285563764/38196460797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cb050ba-9cc2-41be-8279-7fef64df90d7/zf_5hp19_repair_manual_audi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97817624-e677-45d6-a712-a1dc455757e7/97803440424.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc009dd8787e87989674e7e/t/5fc2d6533485235c8624931a/1606604371920/bluetooth_transmitter_software_for_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0491a97599144ebe4a4c/1606288530057/baltimore_orioles_schedule_2018_tickets.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_off0000d4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D2 5744 bytes
SHA-256: 8a80b9df595de02b1c1edaec832cae51997b165f1069d7d48219f1b560c08929
font_01_sfnt_off0000e893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE893 13548 bytes
SHA-256: a7696a1052ac45314a50d2c30b7ffb3197c4c81b73fc763f379b713d2d18851d
font_02_sfnt_off00011297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11297 16336 bytes
SHA-256: 1bef3ecc084c028a1494428fab76f0f1bbd4a8a4466a6fc9c52e7322ff66e82d

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