Malicious PDF — malware analysis report

Static analysis result for SHA-256 b921f87a33d9248a…

MALICIOUS

PDF

76.2 KB Created: 2021-06-09 00:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b769ea64e73179139eaab71e5e043cf8 SHA-1: c9421714d25f4c65a3e0c3d0195d79285b6f5e7a SHA-256: b921f87a33d9248ad816e9a80be983b4c28ac3a43ba57eee3e10ee87916d925a
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://krisoc.ru/pbw?utm_term=hackear+wifi+izzi+con+android PDF link annotation
    • https://rajerese.weebly.com/uploads/1/3/4/3/134387708/070b54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394061/normal_5ffa2fffb9be2.pdfIn PDF document text
    • https://disovipogazita.weebly.com/uploads/1/3/1/3/131398104/resebalo-gelaze.pdfIn PDF document text
    • https://lolusegixasuvar.weebly.com/uploads/1/3/4/7/134770702/nenesolom-zobinoram-xawamiviv-kuxutipomu.pdfIn PDF document text
    • https://mifitulu.weebly.com/uploads/1/3/4/5/134521308/ed401.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386836/normal_6043b5dcb3839.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425726/normal_5fed13faaa8ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411219/normal_5fca33bf7688f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454429/normal_60bc8c5684ff2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457839/normal_6054b97823d14.pdfIn PDF document text
    • https://ferafavobob.weebly.com/uploads/1/3/4/6/134671558/c42817bee272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500677/normal_602ac4a51fe16.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://uploads.strikinglycdn.com/files/b84005e0-60fa-4e3c-9734-2700f2981748/nortons_theorem_example_problems_with_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37ae6b51-e23b-40c1-a73e-4e17286ab71e/the_lightning_thief_book_chapter_3.pdfIn PDF document text
    • http://rabopadob.pbworks.com/f/phim_thp_tam_thi_bo_nm_1970.pdfIn PDF document text
    • http://xumamiz.pbworks.com/f/96315077076.pdfIn PDF document text
    • http://rubepikonot.pbworks.com/f/dragon_village_mod_apk_unlimited_money_and_gems_and_food_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A9 4680 bytes
SHA-256: 8c304c0faabdf61b25e25b5d60e9a00b1efa34fe5a4a34b0a253be65e3477bcb
font_01_sfnt_off0000f2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A6 10776 bytes
SHA-256: f63b7d37839af68820429947e51fe3273c894fec44ac677ce58994cdf1c803b0
font_02_sfnt_off000115c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C8 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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