Malicious PDF — malware analysis report

Static analysis result for SHA-256 e099d36899d27f1a…

MALICIOUS

PDF

75.4 KB Created: 2021-03-23 14:10:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 70a3c1bf06e70e35e59e2afd52337406 SHA-1: cbc3f09ce7d7cef65ce0b77e56db245ae2822e92 SHA-256: e099d36899d27f1a3d4f5df4e6c260a9b325994c750423eb31bdab9d824a6190
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. The presence of numerous external URIs, many pointing to potentially disposable domains, suggests a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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://resalured.ru/wix?keyword=eskipoo+puppies+for+sale+washington PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485161/normal_5fdcb14aa6a32.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/91614282953ygp14.pdfIn PDF document text
    • http://freud.icu/94686963791titlu.pdfIn PDF document text
    • http://silver35.ru/first_alert_9120b_keeps_beeping_after_battery_replacementnq2sw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465257/normal_5fffb22f4eb82.pdfIn PDF document text
    • http://bu-markett.com/zotejuvuzolagulk0yv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486034/normal_6006103f7a875.pdfIn PDF document text
    • http://ecoservice-vlad.ru/vujiwobilidbugx.pdfIn PDF document text
    • http://habercigo.com/gujirozodoxisit2nol.pdfIn PDF document text
    • http://save50.pro/gunipipibifexobelop0s38l.pdfIn PDF document text
    • http://lowabunuzoxa.getenjoyment.net/22196008236.pdfIn PDF document text
    • http://chtotakoevuxom.biz/perdona_si_te_llamo_amor_english_sub6684y.pdfIn PDF document text
    • http://nuxidokugaleme.iblogger.org/15104372258.pdfIn PDF document text
    • http://getcreditreport.info/hoover_dual_power_pro_carpet_cleaner_parts84sof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373511/normal_5ff585c0bf38c.pdfIn PDF document text
    • http://storeeu.info/does_kaz_love_inejwe4bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/93159caa-8ff0-4374-9a41-1fcfc24ac1d6/microsoft_excel_spreadsheet_online_course.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acf3df7f-4d12-49ba-8e2d-89ef11222c00/semewezadipakifijegebew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1a8791-2bd8-4cb1-9559-a8c6c7981226/47987486598.pdfIn PDF document text
    • http://beferujob.epizy.com/ap_calculus_optimization_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92bf23dc-0b8a-42a6-8b9c-034fcb51cca2/what_is_the_largest_species_of_praying_mantis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5a0de9e-a4e5-4e79-8fb3-0a1b85834a31/brother_serger_1034d_parts.pdfIn PDF document text
    • http://litabasiker.onlinewebshop.net/vugebovu.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_off0000eba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA3 5276 bytes
SHA-256: cb2c33bc3ee36a54c93e889ea999fe434443820697a4c4892261148d4a5e554e
font_01_sfnt_off0000fdb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB1 10116 bytes
SHA-256: 44a49ea1f693b40b28070e05bf97dfee11f65b855f2e46b5e456421a06071b85