Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a39593258f7e901…

MALICIOUS

PDF

80.1 KB Created: 2021-03-28 15:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 92cdc744b28fec024715277a8154d470 SHA-1: 5337295b6000064034454ba5a81b2f05c1a9887d SHA-256: 0a39593258f7e901afd3a6f007102884b744affc9e25b4bc73c418f02ff074f8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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/award?keyword=united+arab+emirates+visa+application+form+pdf PDF link annotation
    • http://jakivuxevova.22web.org/aha_guideline_2018_stroke.pdfIn PDF document text
    • http://renijulemigato.iblogger.org/bosonoga_bogini.pdfIn PDF document text
    • http://muldwych.com/nopafavulmz8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385213/normal_60151d1887ca9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470400/normal_6022ca587991a.pdfIn PDF document text
    • http://busibear.com/google_drive_percy_jackson_and_the_titans_curse_movievzjw8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382965/normal_5fe1c05b83afc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408997/normal_5fe82a359cac2.pdfIn PDF document text
    • http://movajapenakinu.22web.org/snakes_and_ladders_3d_game_free.pdfIn PDF document text
    • http://brettlockhart.com/318503201dvpnh.pdfIn PDF document text
    • http://jagefefixod.22web.org/xajisebozesujowekis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371269/normal_602df350bd495.pdfIn PDF document text
    • http://mimasajikataza.iblogger.org/guided_meditation_10_minutes_sleep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501198/normal_603f31fc30767.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490524/normal_600dfcca7f6d1.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/9f1df9a8-25dd-4ffd-aed1-8bc291e2775c/electrical_and_electronics_engineering_books_free_download.pdfIn PDF document text
    • http://xofebobijo.epizy.com/wopum.pdfIn PDF document text
    • http://segudufarus.epizy.com/rekuvakagogixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06f81c89-e132-4ad5-970d-261bf2d62361/pifagekobifapubajomizu.pdfIn PDF document text
    • http://nesasodatujor.epizy.com/get_my_life_together_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80d25bbd-7f3a-4dc5-ae50-1c652bf35a36/78518216217.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_off0000f93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93C 5492 bytes
SHA-256: 48888f32de503925119bf04fc55292a3b7adf85aa8cfee55aa9ee7df2a14f7bf
font_01_sfnt_off00010bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDF 11364 bytes
SHA-256: 5bf00986a8512a8a81e327ed5282a8c65c7257e6cca1d3596c4605c4710c99bb

Open this report in the interactive analyzer, or submit your own file for analysis.