Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0459fc63564f72…

MALICIOUS

PDF

76.0 KB Created: 2021-03-07 07:24:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d5699ba69944589953fab23032d604ff SHA-1: 5f29101430991bd96f87cb75218197eb512edd01 SHA-256: 2a0459fc63564f727e77b2ea972f294f015478aef4ad2922e22c60e0d27facbf
126 Risk Score

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://nipisod.ru/wix?keyword=math+projects+for+5th+grade PDF link annotation
    • https://cdn.sqhk.co/mutexeze/jhjujgT/a3_otome_anime_game_apk.pdfIn PDF document text
    • http://ijmalan.xyz/farm_animals_clipart_blackepm5g.pdfIn PDF document text
    • http://fb-pageunderreview.com/nogurafimepodabonajopile9k8zh.pdfIn PDF document text
    • http://rinujajija.getenjoyment.net/37182785346.pdfIn PDF document text
    • http://pocki.top/lufinovusazogukey03ja.pdfIn PDF document text
    • http://fabermanufacture.ru/51104492110n5vuy.pdfIn PDF document text
    • http://ergors.space/zeiss_ikon_contaflex_camera_instruction_manualmatmd.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/Iihiidu/37702684792.pdfIn PDF document text
    • http://5coupon.info/ar_15_ammo_shortage3sbm4.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/FhfijFZ/5717747637.pdfIn PDF document text
    • http://sberbank.services/24093782739gcq0r.pdfIn PDF document text
    • http://prolac.ru/rasoxekewobifukajb44ul.pdfIn PDF document text
    • http://ductsunlimitedins.com/laxisakoztyx4s.pdfIn PDF document text
    • https://cdn.sqhk.co/xejulonejo/UjahgB1/64826796134.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fumojaw.epizy.com/99465989279.pdfIn PDF document text
    • http://mukadepokexow.epizy.com/55628372932.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/bluestacks_3_for_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/fusionner_plusieurs_pages.pdfIn PDF document text
    • http://zitejilid.epizy.com/nichd_fetal_monitoring_guidelines_2008.pdfIn PDF document text
    • http://kadoxosin.atwebpages.com/graphic_designer_salary_2020_usa.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_off0000ec4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4B 5588 bytes
SHA-256: f44901d49a457e81a2e7e4e8c3a1ef0de038399f0a4dbca2c28334a66317cdd1
font_01_sfnt_off0000ff5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5F 10240 bytes
SHA-256: d366a45fcee3ed409b08f8638fcd77c9d3bf318c1f007d689f465549385fa2e6

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