Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aacf6ba6b9e47f3…

MALICIOUS

PDF

72.0 KB Created: 2021-02-18 23:47:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 6587f906d2491c81ac498e2e9cdf60a8 SHA-1: c82936de2bf1c75687300cc0f33ae9fef8bc50c8 SHA-256: 1aacf6ba6b9e47f34daa7e1aa718421311484104102a3f37ae4de1cd32ae58f6
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to phishing or malware-hosting sites. No scripts were extracted, but the presence of numerous links indicates a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/strik?utm_term=new+yorker+cat+cartoons+book In PDF document text
    • https://suniponemiviku.weebly.com/uploads/1/3/1/6/131636748/3255d3ed1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380705/normal_5fce38dc984da.pdfIn PDF document text
    • https://zesadokalefon.weebly.com/uploads/1/3/2/6/132681767/judukerezed_lawakan_rodejopup_xolima.pdfIn PDF document text
    • http://chategratis.online/naruto_shippuden_legends_akatsuki_rising_cheats_download4tidc.pdfIn PDF document text
    • https://fefezotexarij.weebly.com/uploads/1/3/4/2/134265886/xefamazajaka-goxij-ferikawo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493282/normal_5ffcccd1285d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387061/normal_600219e7c97b3.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/bjd2gcR/97884888583.pdfIn PDF document text
    • https://rabofabi.weebly.com/uploads/1/3/0/8/130813834/vakarokovupemujafop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452385/normal_5fda27a18f094.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/ddghJif/race_timer_app_iphone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vigibuvene.epizy.com/1719737294.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2D 4868 bytes
SHA-256: e2ed0df0229c5174541541ba45dd0982282fb89a053697ab93ef145a9beef256
font_01_sfnt_off0000ded9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED9 10888 bytes
SHA-256: dd0ea9f30f1552481309a824ab860fb030d03b20a8497b404266de9811756cac
font_02_sfnt_off000103cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CB 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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