Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24b40bb7de86330…

MALICIOUS

PDF

73.8 KB Created: 2021-05-20 19:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: dac9fe9e2374346d844fd3ce0d2fbcc7 SHA-1: 7cbf2e7795e38d75d0e4868adcf3453082c28dca SHA-256: a24b40bb7de8633098c572292f3661ceb987999010a4ab06a840f3bdd52078b9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous URLs, with one prominent URL pointing to 'jumiwimov.ru', suggesting it's part of a phishing or malware distribution campaign. The PDF structure and embedded content indicate it's designed to masquerade as a legitimate document to trick users into visiting malicious sites.

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
  • 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://jumiwimov.ru/strik?utm_term=homojen+ve+heterojen+kar%25C4%25B1%25C5%259F%25C4%25B1m+nedir+k%25C4%25B1saca PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421944/normal_5fd2f8d68f97b.pdfIn PDF document text
    • https://fogasofimoxor.weebly.com/uploads/1/3/1/0/131071298/wesuvexe.pdfIn PDF document text
    • https://pejasosujotu.weebly.com/uploads/1/3/2/6/132683127/2205111.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472793/normal_5ff71219403ad.pdfIn PDF document text
    • https://fojaxusulilunud.weebly.com/uploads/1/3/1/3/131381134/aee5966987b374f.pdfIn PDF document text
    • https://feronodi.weebly.com/uploads/1/3/0/8/130813799/5708727.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383795/normal_60048fb223987.pdfIn PDF document text
    • https://xegezegev.weebly.com/uploads/1/3/2/6/132683484/lizeku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383572/normal_603d05b500576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413017/normal_6045c1c090a81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503197/normal_6045eb4dac57a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494866/normal_60142369e791f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504641/normal_606a3ab50355b.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/d476542e-5563-4736-b88b-5cfa06f5a1a1/mcsa_windows_server_2012_r2_complete_study_guide_william_panek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afbbec36-f6a0-439d-a734-d20f599a3fe9/pepamixidixixivibixaridow.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/4615918140.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/verbo_to_be_affirmative_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87456c23-9da7-4000-9285-14cfb66861e3/lg_inverter_direct_drive_washer_dryer_how_to_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eef1df4e-4bd4-4e04-abf1-8047dcb367e1/yamaha_receiver_rx-v473_manual.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22D 5588 bytes
SHA-256: c50504c4dd347f9a132ff7c7f568a07f02f0422016363ffecce1d13e4172e3cf
font_01_sfnt_off0000f48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48F 11872 bytes
SHA-256: a7f4fa4b9e8d74844f1a59349d2740fd4a4705e2a6fdde33895fff763bc1d5fd

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