Malicious PDF — malware analysis report

Static analysis result for SHA-256 323924783ada1aed…

MALICIOUS

PDF

83.1 KB Created: 2021-03-20 05:01:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7aa31f8f0c944e00545a6843c33ed129 SHA-1: 585b4507f87ddd1b5a1d1206f35bf295c14a32ea SHA-256: 323924783ada1aedd7cb9f88bd26a68b6a5775ff1ff98afd4e5ac016ab141054
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a phishing or scam attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious redirector designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dafemum.ru/strik?utm_term=digital+marketing+course+fees+in+delhi+quora In PDF document text
    • http://ru-order-687646765445.art/lujar31ku1.pdfIn PDF document text
    • http://national-verifyteam.com/bear_ears_headband_templateluigv.pdfIn PDF document text
    • http://fubogabosurek.22web.org/korepijikadune.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/ZMjc7fQ/zodosedubu.pdfIn PDF document text
    • http://prolac.ru/kindle_books_unlimited_shgi01.pdfIn PDF document text
    • http://pemarozelim.iblogger.org/panchtantra_stories_in_sanskrit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505820/normal_6028e5f2512d9.pdfIn PDF document text
    • http://cabinetsly.xyz/behold_the_dreamers_essayaapwd.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/sig_sauer_1911_fastback_nightmare_carry_reviewp9s2x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450733/normal_600dee0e5754e.pdfIn PDF document text
    • http://chambreapp.xyz/do_tomatoes_grow_all_year_roundjar4v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5fd60f7dd6c47.pdfIn PDF document text
    • https://cdn.sqhk.co/jaguwubax/hhcPdih/mini_golf_battle_creek.pdfIn PDF document text
    • http://podeves.xyz/5835405511979d1l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415742/normal_6041c59ec8eaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407552/normal_604833aa18789.pdfIn PDF document text
    • https://cdn.sqhk.co/nemisova/iajchap/57767906489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416144/normal_60128b48a93d2.pdfIn PDF document text
    • http://airned.ru/13739062564cis60.pdfIn PDF document text
    • http://fastcreditreport.info/wijobezuzusiletenex42zk7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xezepagonozaniw.epizy.com/zonevatexexofojekubefa.pdfIn PDF document text
    • http://movafomuwexowix.epizy.com/2point_ke_bana_batho_bana.pdfIn PDF document text
    • http://sirirowevaga.rf.gd/xowenukipudopojiminivoba.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_off000106b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B3 5624 bytes
SHA-256: f106be55a168d8d013702f96462105847ba9e7a67f574c1629ab2dc1e8765f68
font_01_sfnt_off000119a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A8 11140 bytes
SHA-256: 1f48309e5abe643bc18b577ac8aeb040b020cb0c534874375a8af9c6cdf4fb00

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