Malicious PDF — malware analysis report

Static analysis result for SHA-256 e464b1b9379d5b84…

MALICIOUS

PDF

76.9 KB Created: 2021-01-24 16:49:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0dd292ac4cf802b504fc8195d0da45b6 SHA-1: 3cfc89cc731dfa788bbc87c6f69021c657088b9f SHA-256: e464b1b9379d5b845ddc6251e78769b5d5fd6f4bc603e0ac4c87f3557693420b
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting an attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to host a large number of links, likely for SEO poisoning or to distribute malware. No scripts were extracted, but the presence of external URIs and the link farm heuristic point to a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wb?keyword=facebook%20twitter%20analytics%20tools PDF link annotation
    • https://cdn.sqhk.co/soxuwutitaw/jyOARhi/live_video_wallpaper_naruto.pdfIn PDF document text
    • https://cdn.sqhk.co/zewuxumaro/RN17X21/battle_in_seattle_movie_download.pdfIn PDF document text
    • http://lesanuzununefa.22web.org/benilanafizapuxuved.pdfIn PDF document text
    • https://cdn.sqhk.co/kunagukojoxu/XMjbLje/42521798397.pdfIn PDF document text
    • http://zazeteku.iblogger.org/kaspersky_lab_antivirus_software_free.pdfIn PDF document text
    • https://cdn.sqhk.co/joxopejufito/gg5zjjb/rounded_corner_pro_apk.pdfIn PDF document text
    • http://rafonuza.22web.org/15509838276.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/ihaifgu/25543325118.pdfIn PDF document text
    • https://cdn.sqhk.co/xugosovemi/aaPRG07/97610393456.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/eAiaicv/3639151901.pdfIn PDF document text
    • https://cdn.sqhk.co/tidelefuzin/ifge3yq/funny_hot_viral_videos_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/rurewemanavi/zvifUIF/vanojumiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fixadamobus.epizy.com/ikea_maroc_catalogue_2017.pdfIn PDF document text
    • http://sibijexobesu.epizy.com/70802395023.pdfIn PDF document text
    • http://febiked.rf.gd/4113966744.pdfIn PDF document text
    • http://fetevatakipip.epizy.com/holland_house_infant_school_ofsted_report.pdfIn PDF document text
    • http://xodezuraweba.rf.gd/kugotasireb.pdfIn PDF document text
    • http://fekerudosepu.rf.gd/plastic_animation_app_for_android.pdfIn PDF document text
    • http://gulavofi.epizy.com/borders_for_word_free.pdfIn PDF document text
    • http://zunimesigo.rf.gd/time_word_problems_grade_4_worksheets.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A4 4932 bytes
SHA-256: 4a7e6873a3d09e0820263a8a101ee5bc0d52c5b887bc870107f872292f62d1fb
font_01_sfnt_off0000f37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37F 10668 bytes
SHA-256: c8b5c373030abfe69d1179b94976ee1b2404fdebf477c7f61d7d06484aae1973
font_02_sfnt_off000117d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D6 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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