Malicious PDF — malware analysis report

Static analysis result for SHA-256 60130ca03925c569…

MALICIOUS

PDF

77.8 KB Created: 2021-03-20 22:44:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a6240f13a8dd3a9d2bcf2b0e6e233338 SHA-1: b3a11ff1bc6816b1ddf9632c7e1eaa6a53892152 SHA-256: 60130ca03925c569d9323d2c5aea583b51ea62ad2cd92690f9f251ef346adf4e
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://golowaki.ru/wix?keyword=hp+wireless+keyboard+installation+software PDF link annotation
    • https://cdn.sqhk.co/jedugifaxido/jhhcwsw/65599074957.pdfIn PDF document text
    • http://tcerkovniekupola.space/7657507476822ezj.pdfIn PDF document text
    • http://blog-millionaire.buzz/62942717093darh1.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/NjatTRp/friends_build_tiny_home_community.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497344/normal_5fc98be8a52bb.pdfIn PDF document text
    • https://cdn.sqhk.co/xoresarib/cTWALOU/fortnite_black_hole_mini_game_code_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/hj41Wjb/65418873784.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476767/normal_5fee69417bd32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487184/normal_5ff9625cba797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408981/normal_60462d361c17c.pdfIn PDF document text
    • http://meriline.store/7164794155655k1j.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/gZ4SjcB/mugozukufajupupatakusin.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/jajblin/torn_meniscus_mri_of_knee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f7ff368-4a25-49e7-8c2d-7450ada4040f/remewurisoganimoke.pdfIn PDF document text
    • http://magivuxitafexox.rf.gd/canoscan_lide_120_driver.pdfIn PDF document text
    • http://musizaxodolof.epizy.com/printable_address_book.pdfIn PDF document text
    • http://mekamaxabojumoz.epizy.com/sql_server_2016_sample_database.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f7431d6-2f6c-43c8-82e4-9de7c789a0f8/positive_psychology_online_course_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef554f8a-4e90-4404-917c-6c381206b9d6/harga_g_shock_ga_100_original.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_off0000f21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21A 5392 bytes
SHA-256: 48b81eb47798299888fdb5b6a643656085f0614e79a7c1644362d1d60fdfa129
font_01_sfnt_off0001048d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048D 11104 bytes
SHA-256: 3309c71119b33f481d2d98b859632335a923560c8bd79b05a34acc4566415dd5

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