Malicious PDF — malware analysis report

Static analysis result for SHA-256 1186bf90846de614…

MALICIOUS

PDF

76.1 KB Created: 2021-02-16 06:42:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fa3554b03f7797649e5d8e2b10888aeb SHA-1: ed14ef4b56f70e5cdc2da8502408b81fd8dc442e SHA-256: 1186bf90846de61430154f91950b0f436520c55acafa9dffe3749fe33fc6196c
134 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm on disposable hosting. The embedded URLs, such as 'https://jottigo.ru/strik?utm_term=gloria+copeland+healing+confessions', suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/strik?utm_term=gloria+copeland+healing+confessions PDF link annotation
    • https://busununivid.weebly.com/uploads/1/3/4/7/134774072/b134c5bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470540/normal_60170a736acd6.pdfIn PDF document text
    • https://pezibife.weebly.com/uploads/1/3/4/3/134376528/lanufu.pdfIn PDF document text
    • http://tesocoin.online/89069002840mtgy3.pdfIn PDF document text
    • http://fakts.design/jufezemixavg33d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369774/normal_5ffb4f9b2482a.pdfIn PDF document text
    • https://zikawudewodag.weebly.com/uploads/1/3/4/5/134585044/nukad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469358/normal_5ff79c53e5488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475572/normal_6021d620379e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467300/normal_6011ed992efde.pdfIn PDF document text
    • https://zamosokajuzosa.weebly.com/uploads/1/3/4/6/134651904/lekegirer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488855/normal_5fef42807e95d.pdfIn PDF document text
    • http://1xbets-regs.site/snake_plant_care_sheet3y1ro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413109/normal_5fe85d256adb6.pdfIn PDF document text
    • https://rafutadavo.weebly.com/uploads/1/3/1/6/131637052/8564844.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
    • https://s3.amazonaws.com/fuwawibu/henry_danger_crime_warp_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/ginakaxuvuwobedekejif.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_off0000e13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13C 5156 bytes
SHA-256: d4df555f96c180521cc417d2c0f4e3f48dd94ee3d76df91e44d8c0755412ca52
font_01_sfnt_off0000f2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B7 10176 bytes
SHA-256: da7a4966b691d048537a9145f4a1f5233e98db2d92783f3a2a91f419590cde79
font_02_sfnt_off00011577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11577 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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