Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcdd87fc1517a012…

MALICIOUS

PDF

76.5 KB Created: 2021-03-15 17:43:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2aaf9ac0ccf760bfea488728909d2e39 SHA-1: c9515fcf2bc112e2a23aa9c8b68bab99ca7c8f48 SHA-256: fcdd87fc1517a012692925adb9178c2f58dce2aecb4cf718d5c4814e6bc99d9e
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://mezovuduw.ru/award?keyword=trastornos+alimenticios+en+los+ni%25C3%25B1os+pdf PDF link annotation
    • https://wosubazaroden.weebly.com/uploads/1/3/0/8/130813518/3373450.pdfIn PDF document text
    • https://cdn.sqhk.co/gutifusuf/gj8lh5q/62220373497.pdfIn PDF document text
    • https://romevezijije.weebly.com/uploads/1/3/4/7/134756673/takovif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450003/normal_6039a3cd0e655.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/gghdvfX/xabibofexego.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410462/normal_60134ef87044f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484633/normal_6002d208af5cb.pdfIn PDF document text
    • http://pivojowemetobiv.mywebcommunity.org/alimentacion_en_el_embarazo_y_lactancia.pdfIn PDF document text
    • https://volejodanuba.weebly.com/uploads/1/3/4/5/134593723/bcebef302e.pdfIn PDF document text
    • http://kunujunekedi.mygamesonline.org/47932789780.pdfIn PDF document text
    • http://kpovli.ru/how_much_is_rosetta_stone_japanesefkc7l.pdfIn PDF document text
    • http://zefujixa.mywebcommunity.org/busijabib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424010/normal_602d2c6dc0316.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389793/normal_60040dc7d0fc6.pdfIn PDF document text
    • http://mantenancie.com/black_ops_cold_war_pre_order_price5vhj5.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/31553488872.pdfIn PDF document text
    • http://usejus.club/mobusetewazufamvc8dh.pdfIn PDF document text
    • https://vurifupilubat.weebly.com/uploads/1/3/4/4/134495287/9889035.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/Uiju6id/map_bedwars_minecraft_ps4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/when_you_share_a_memory_on_facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/paradise_lost_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/how_old_do_you_need_to_be_to_get_your_drivers_license_in_arkansas.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_off0000e967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE967 5464 bytes
SHA-256: 1271cfee464247afceaf93f7510546b2d4f99a7e9ac7dee00de9ddbfbe5280f8
font_01_sfnt_off0000fb9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9E 11912 bytes
SHA-256: f90530535890bd335c38ea03f00544123f5850710f7fc5b72717e618453ad64e

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