Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0eab2b52767b3e…

MALICIOUS

PDF

81.2 KB Created: 2021-03-22 00:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5f0d130e293d144551e6fdd3bf050ee SHA-1: 1e18a4017c7f60c5090d084d4761d154cc88e975 SHA-256: 9f0eab2b52767b3e5a9dbbb0a6f6d33bbb8b9e538ea3bac1c4f443d030ba0f1d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to trick users into visiting malicious sites, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://druttle.ru/award?keyword=tsc+promotion+appraisal+form+pdf
    • http://banademebilite.sportsontheweb.net/behavior_intervention_plan_template.pdf
    • http://bometaximom.scienceontheweb.net/walmart_black_friday_sale_11_14_20.pdf
    • http://axecheat1.xyz/44846984522rj9w0.pdf
    • https://cdn.sqhk.co/resozasevej/iujezjr/71150176273.pdf
    • https://cdn.sqhk.co/dagizonu/hhViujg/jetosupexupunedoxega.pdf
    • https://cdn.sqhk.co/pulijidapis/Uiirfkw/aquarium_acrylic_sheets_uk.pdf
    • http://wiboratiraveguw.mygamesonline.org/article_3_of_the_1987_philippine_constitution.pdf
    • https://cdn.sqhk.co/nokotadi/hihjFjc/video_for_whatsapp_status_funny_download.pdf
    • http://vugekowuzujed.scienceontheweb.net/psychoanalytic_theory_in_childrens_literature.pdf
    • https://cdn.sqhk.co/kevovevude/jbFeybL/badul.pdf
    • http://tufofol.medianewsonline.com/how_to_read_korean_easily.pdf
    • http://suwefazimim.medianewsonline.com/shaker_workbench.pdf
    • https://static.s123-cdn-static.com/uploads/4457006/normal_5fe1b5c439fda.pdf
    • http://jarevine.mywebcommunity.org/sacramental_theology_a_general_introduction.pdf
    • http://1gusevshop.space/fojolujdsr6.pdf
    • https://cdn-cms.f-static.net/uploads/4385417/normal_604e6785323ce.pdf
    • http://kazexajisodibu.medianewsonline.com/54557967367.pdf
    • https://static.s123-cdn-static.com/uploads/4419204/normal_60037936b91e4.pdf
    • http://sipataj.sportsontheweb.net/dungeons_and_dragons_online_playable_races.pdf
    • https://cdn-cms.f-static.net/uploads/4388611/normal_6048dc1a18809.pdf
    • http://rujewazaxijaza.sportsontheweb.net/turatajepexifejo.pdf
    • http://ritual-venki.online/49638984980pehhz.pdf
    • https://cdn-cms.f-static.net/uploads/4386824/normal_600a735de8d5a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fiforeru.atwebpages.com/how_to_use_a_steamer_bamboo.pdf
    • http://rususekobijo.myartsonline.com/ocular_pathology_textbook.pdf
    • http://kutoxinupuroxo.onlinewebshop.net/44477366456.pdf
    • http://samajusinifako.atwebpages.com/gst_authorisation_letter_format.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe26.bin
0de561c51481aab2d51af833ef46a01bb6bd9d425cc659af26f0ac714132083b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE26 5248 bytes
font_01_sfnt_off00010fe7.bin
d620b5b531ba2cf76a7c8e789eaf7542525b3650fd135b85dbc139a508427910		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE7 11432 bytes

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