Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a18f57189bc1bf…

MALICIOUS

PDF

85.2 KB Created: 2021-01-23 06:53:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 21abef98d874b55c12dc1cb465a33536 SHA-1: 9d3f530d577fa02fdfbbc487dc77b265a5a6f154 SHA-256: e2a18f57189bc1bf6f9e2ade27790fc84f7add47b83175b6bc7297a34d29a970
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The embedded links, such as 'https://traffmen.ru/123?utm_term=y%253Dsecx+tanx+graph', are designed to lead users to potentially harmful sites. The document's structure and embedded links suggest it is part of a phishing campaign or a distribution mechanism for further malware.

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 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.
  • 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=y%253Dsecx+tanx+graph In PDF document text
    • https://static.s123-cdn-static.com/uploads/4467036/normal_5fc7469f0379f.pdfIn PDF document text
    • https://site-1222430.mozfiles.com/files/1222430/gopotanoded.pdfIn PDF document text
    • https://site-1195597.mozfiles.com/files/1195597/rc_yowhatsapp_7__99_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/gjWggha/55681220105.pdfIn PDF document text
    • https://site-1174578.mozfiles.com/files/1174578/zig_zag_stripe_coupon_code_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5fd66076216a9.pdfIn PDF document text
    • https://site-1178351.mozfiles.com/files/1178351/vikings_saints_game_highlights.pdfIn PDF document text
    • https://cdn.sqhk.co/nexoratuxi/UjhAkk1/18074439562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404490/normal_5fe84990a99ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417662/normal_5fff6a1476a13.pdfIn PDF document text
    • https://cdn.sqhk.co/jifedibodo/Kjadhje/fanuc_cnc_turning_simulation_software_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477376/normal_5fd1ff0c38f65.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/lOFjbUg/free_hd_movies_download_sites_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492600/normal_600aac2dacd01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381287/normal_6004802bf3f94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473044/normal_5fc762fcdf3a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375503/normal_6004eafb8d793.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/sowewazulejewi/lajubejorekokadibeva.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/89674937596.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_off00010fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FED 5236 bytes
SHA-256: 0914ac6beb59a54f0930cf1d38595be362b92c5ae8802e6e9ac9776b52e8c2f7
font_01_sfnt_off000121c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C8 11472 bytes
SHA-256: 9e233e9607206df706f8b167e825ca567f7ab2d4e334c2b6e956a14c82ab05a7

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