Malicious PDF — malware analysis report

Static analysis result for SHA-256 db3385152109393b…

MALICIOUS

PDF

76.8 KB Created: 2021-03-28 21:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 87cbe7a1521cc6a793be601daf406da4 SHA-1: 1a90199e50086489144b810c21511a31d70107d4 SHA-256: db3385152109393b4f1344248881ebae7b77a222f0a89324028fe327903c621f
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/wix?keyword=carter+braxton+family+tree PDF link annotation
    • https://cdn.sqhk.co/tobizopowebo/apgegij/25909654986.pdfIn PDF document text
    • http://operationhomeplate.com/how_to_get_xbox_codes_for_freezbi07.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvuxemoguf/jfgg5fY/kimemefadetesanafod.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/hhjdhid/43068504625.pdfIn PDF document text
    • http://dkmz1.club/5462643629j2b10.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/ijgjrf9/84137076160.pdfIn PDF document text
    • http://persequenteamsohbet.com/newest_iphone_releases4ydj.pdfIn PDF document text
    • https://cdn.sqhk.co/nimabugokofa/hehgggh/woodturning_tools_and_accessories.pdfIn PDF document text
    • https://cdn.sqhk.co/rewaloxuruvu/djgwSic/pexotalosobefosufiluxiko.pdfIn PDF document text
    • https://cdn.sqhk.co/tejosepu/sgcopge/41475412314.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://makitononudovo.epizy.com/1174819291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d63420d7-6ed8-4603-95c3-c08078a0a7f9/verbal_reasoning_practice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fdfe819-2c80-46e4-a1bb-7373a18cf0ec/93848428140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b542e9-008c-4ad4-8cf5-823a8fd09965/usmc_junior_enlisted_performance_evaluation_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa445199-c8bc-4f87-acd4-df1727046c9e/calories_in_el_pollo_loco_flour_tortilla.pdfIn PDF document text
    • http://lesizuli.epizy.com/big_hero_6_soundtrack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ca0ea46-703b-4fa6-9d3b-a7af1cc98004/tao_tao_110_atv_dealers_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb6c5eb2-2fe5-4684-a869-8c4e3c3b7238/they_say_i_say_chapter_4_and_5_summary.pdfIn PDF document text
    • http://muwakibe.rf.gd/puvonosojumitegumeke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72535101-93bb-46bc-a74f-963d1dbd19ef/kemafisulomaligew.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_off0000eef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF1 4948 bytes
SHA-256: 48a1721591e5c1263938c36b94a8cf67694543ff496744bb8f956b0f5b1a1e9f
font_01_sfnt_off0000ffc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC1 11160 bytes
SHA-256: 86b3d17ff0fcb158669850e4ee079a1c7874a50f03f3336f61c32cde146b8022

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