Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2510b039ebad088…

MALICIOUS

PDF

74.4 KB Created: 2021-02-11 05:08:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c012d8eff6191d2d12a4d4f1277c19f9 SHA-1: dd31ac2cd17bcfbce8f052144a8dca45e92e4f39 SHA-256: a2510b039ebad08806ae6860e610ebb503d7671351ea0d8054d8ea3c009216ff
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, a common tactic for phishing or malware distribution. The PDF's structure and embedded content suggest it's designed to redirect users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/123?utm_term=the+prestige+libro+pdf PDF link annotation
    • https://cdn.sqhk.co/nuzinipaz/Z2hdicc/i_remember_everything_when_i_m_drunk.pdfIn PDF document text
    • https://cdn.sqhk.co/jidevumedure/n33MPid/realpolitiks_new_power_review.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/gegjvqB/33064752632.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/2jcObie/amazon_face_masks_disposable_made_in_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/qNxhggg/color_picker_hex_code_chrome_extension.pdfIn PDF document text
    • http://shop-onlain.fun/rozanakosupexapje.pdfIn PDF document text
    • http://amst-watch-v1.club/22382606064yn6iw.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/1OAhhh9/elements_massage_spokane_wa.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/JjdjhVK/army_love_full_hd_wallpaper.pdfIn PDF document text
    • http://agreevudb.rest/7023461003265xx6.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/gh0hceA/nelewolugux.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/hZ2jan5/sirako.pdfIn PDF document text
    • https://cdn.sqhk.co/babakobesuxe/RDvSMY2/looping_video_in_youtube_app.pdfIn PDF document text
    • http://rimka.xyz/5105235735za8rf.pdfIn PDF document text
    • http://mazers.fun/advanced_microsoft_excel_20132giby.pdfIn PDF document text
    • http://fitness1.space/christmas_poster_background_freej91qp.pdfIn PDF document text
    • http://fsfsfd.xyz/bpsc_nursing_result_20185tzld.pdfIn PDF document text
    • http://voirlo.xyz/ritixofelujuvav7ahji.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/9jl7hg3/facebook_lite_free_mode_mtn.pdfIn PDF document text
    • http://podarokinsta365.site/avg_zen_premium_apkqmn1m.pdfIn PDF document text
    • https://cdn.sqhk.co/rarirawibowo/hfYNrrI/24044996308.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/W66rjh4/44304031114.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/hdihgiC/phoenix_suns_rumors_and_news.pdfIn PDF document text
    • http://paganel.world/synonyms_antonyms_homonyms_heteronyms_definitionzvvcd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54B 5180 bytes
SHA-256: 4d10a2f7f405f784fabd28970199b140fafa175a72e98d375335049574a72c7e
font_01_sfnt_off0000f6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E0 10912 bytes
SHA-256: 40d88f20629d9cb673b069e37bcbe840692c4aa1e0f0d9eef6fb1ea17377d635

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