Malicious PDF — malware analysis report

Static analysis result for SHA-256 78515958676fd983…

MALICIOUS

PDF

78.2 KB Created: 2021-03-22 19:45:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b4f3936e5fa8ca502deb069d55bdff8b SHA-1: 59c8be92736ce240bd1d7ff6ebc134440a162a03 SHA-256: 78515958676fd9831ac8806c5ec332419432f4a92453edadcd825532702791dd
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://pelibifir.ru/strik?utm_term=lord+of+the+flies+by+william+golding+book+review PDF link annotation
    • http://leledup.mypressonline.com/all_formula_of_electrical_engineering.pdfIn PDF document text
    • http://confirmationhelpcenter.com/literary_devices_and_their_meanings_and_examples7vgag.pdfIn PDF document text
    • https://lekusimije.weebly.com/uploads/1/3/1/3/131383821/gixabelunoguze.pdfIn PDF document text
    • http://ruwosiju.getenjoyment.net/xerox_workcentre_7855_price_in_india.pdfIn PDF document text
    • https://cdn.sqhk.co/degamuwubela/hfgjgjk/app_assistant_huawei_nova_5t_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/Ghjhifl/cafe_racer_motorcycle_jacket.pdfIn PDF document text
    • http://pressit.fun/glacier_bay_faucet_cartridge_assembly6v27a.pdfIn PDF document text
    • https://mijolepeworid.weebly.com/uploads/1/3/5/3/135394353/fopiburipiroraj-xupafox.pdfIn PDF document text
    • http://mrshadow.net/pepurupezaxalububi6f714.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/gncCuhf/chase_zelle_application.pdfIn PDF document text
    • http://ponemofetu.scienceontheweb.net/livofivini.pdfIn PDF document text
    • https://devudupaf.weebly.com/uploads/1/3/4/8/134880603/328652.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/ZZhd3jj/21236545396.pdfIn PDF document text
    • http://tublitalia.fun/64573871375i9m9n.pdfIn PDF document text
    • http://saroforati.medianewsonline.com/barking_at_the_wrong_tree.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pozobopaxupuwu.epizy.com/34306470848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e07bf46-3d7c-4e66-95c7-02b219f7bca5/can_my_dog_live_with_arthritis.pdfIn PDF document text
    • http://sisawujeza.rf.gd/nelson_math_workbook_answers_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05c6cb06-c02b-47f8-a009-48fad86da657/elementary_korean_workbook_ebook.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_off0000f119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF119 5720 bytes
SHA-256: 0371e3c4f38090c7b9659ea72171ff571337fc3cd5ddce9cc6b41d66eecd5bc3
font_01_sfnt_off00010485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10485 10860 bytes
SHA-256: b4a75c5aae18516146efe47caed6e43c1c5be12b8b86ab712b4ea67254cfa7cc

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