Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbae5c2d13bc697f…

MALICIOUS

PDF

82.1 KB Created: 2021-06-03 19:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e62626f56597181bf4999c7e542b467f SHA-1: b4d99fbffcef068c45a9d47f217b798d3600b531 SHA-256: dbae5c2d13bc697f800594f8065954f923725a115cff1b8bb2ca434be8ce4be0
186 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. 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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/123?utm_term=buildbox+2.+3+3+with+crack PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4453100/normal_60b030bc7f624.pdfIn PDF document text
    • https://giwedogifuj.weebly.com/uploads/1/3/4/7/134741463/2635390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447497/normal_602d7b333ab6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491426/normal_606617b3c5a39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_605ae61c01b4c.pdfIn PDF document text
    • https://jofajode.weebly.com/uploads/1/3/5/3/135346524/buzagenamegukudoxewe.pdfIn PDF document text
    • https://xazupegenam.weebly.com/uploads/1/3/2/6/132695472/wetifitifabada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479235/normal_6048c0e2e6f7e.pdfIn PDF document text
    • https://rozinefowo.weebly.com/uploads/1/3/4/5/134576391/7409544.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_600fd2417ec42.pdfIn PDF document text
    • https://xikaxuroloxo.weebly.com/uploads/1/3/1/4/131406092/900829.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419425/normal_5fed785c84625.pdfIn PDF document text
    • https://jozevupipe.weebly.com/uploads/1/3/5/3/135346753/vumilazekifukadaki.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/01a8f0d3-7258-49e3-8c98-b80e6ff58852/rose_then_and_now_bible_maps.pdfIn PDF document text
    • http://vafobotigef.pbworks.com/w/file/fetch/144526311/sabatareti.pdfIn PDF document text
    • http://zilebunod.pbworks.com/f/5136403933.pdfIn PDF document text
    • http://gamaxidad.pbworks.com/w/file/fetch/144554376/al_quran_bangla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ff07a4a-b65a-4ec4-a311-c23805ca1827/a_todos_los_chicos_de_los_que_me_enamore_para_siempre_reparto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ce057d7-8985-4eb4-a262-0aae17de04de/what_to_say_at_farewell_speech.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_off0000ea7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7A 5248 bytes
SHA-256: 50741322a83795d5dca0db40c5545b7704c17f759cb2bd8d33cbc8ccd3d67fe3
font_01_sfnt_off0000fc77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC77 21320 bytes
SHA-256: c2aebf830f9014ec4a8d5b1abfb761b73b47c4bb287961f774ea7d43469ffff0
font_02_sfnt_off00012d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D34 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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