Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7be4bd6a6047104…

MALICIOUS

PDF

68.1 KB Created: 2021-03-27 21:34:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ce71e78cd4d75c7e1995ae430b08e4ab SHA-1: 57c2c40fe449d61704beaae1b7ea6e520618c103 SHA-256: f7be4bd6a604710411e7778a697155c27acc074f007ed4dcf0f57340f846649a
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 0.9998

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://soxebez.ru/award?keyword=circle+theorems+cheat+sheet+pdf PDF link annotation
    • http://spain50off.info/hp_replace_cartridge_errorbudyw.pdfIn PDF document text
    • http://italysummer.fun/rolimozaliditumadopozibaur8v.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/1awQPMQ/ski_jumpers_workout.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379231/normal_5ff5ccef0da50.pdfIn PDF document text
    • https://cdn.sqhk.co/tumokufagu/VBgygja/36719620555.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479433/normal_6035d04316d10.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/jKq3CAe/nubalubadigowed.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/aTSyFRh/81974401036.pdfIn PDF document text
    • http://bossyonlinex.com/85603482735xi3ue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450250/normal_605b480185f22.pdfIn PDF document text
    • http://winoorama.fun/33502274195phz1p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365599/normal_5fe161b3b5a02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mogipegi/is_my_capitalized_in_a_title_mla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1903c9bc-b7d9-4d97-9fee-ac1a7278f896/pawogukekowivapovegodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e50ac724-0547-426e-bf11-b58714692e44/phonetic_alphabet_chart_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac1eda2-a93c-4d50-9c58-31a42c899756/astatic_pdc1_compact_swr_meter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49a77a0b-107c-4933-8f4a-037266411c66/80766201652.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/a_m_b_u_ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/insulation_sheets_100mm.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_off0000ce42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE42 5300 bytes
SHA-256: 4a37399d4c545056dc0064577c868050c1ab23cdaf2faeb1dc0d65c206119ac8
font_01_sfnt_off0000e014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE014 10332 bytes
SHA-256: 04a0b46edd085c690f3595bc2608862ca9aa88c157986007c8c259365714cbe4

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