Malicious PDF — malware analysis report

Static analysis result for SHA-256 988316b56d28c480…

MALICIOUS

PDF

103.1 KB Created: 2021-02-21 05:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 643410d0efff5edded14b641fb763796 SHA-1: afd48c8237da35a6f94ad6aa54337d75e23079ed SHA-256: 988316b56d28c480bf21bbb7a2139f9cc467721254a441685bb585b8208516e3
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for a phishing trojan. It contains a large number of external links, identified as a link farm, pointing to various domains. The ML classifier also strongly indicated maliciousness. The primary function appears to be directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=changeling+the+dreaming+pdf PDF link annotation
    • http://bizivademix.iblogger.org/blockman_go_apk_indir.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/hdhdzja/84217374864.pdfIn PDF document text
    • https://cdn.sqhk.co/liripudeb/jhZLhiw/24337237934.pdfIn PDF document text
    • https://rilavowa.weebly.com/uploads/1/3/2/7/132740415/7482594.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/zjdgj1P/download_music_mp3_player_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494136/normal_5ff905ff9f4ab.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/wgjCPHu/chatbot_chat_call_meet_her_husband.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/9DYhhjb/space_shooter_galaxy_attack_galaxy_shooter.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/buibghu/sifunefufiwiluxubebasugok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411717/normal_5fe8bf2d1dbeb.pdfIn PDF document text
    • https://foxenaduro.weebly.com/uploads/1/3/1/1/131164157/jevekovilutam_kuzufis_kezawavalelav.pdfIn PDF document text
    • https://cdn.sqhk.co/nisisepolo/nighfhi/othello_movie_1995_soundtrack.pdfIn PDF document text
    • https://kexekogu.weebly.com/uploads/1/3/1/3/131384418/gezubanulafoj_malov_bakadakir_lobebisopifog.pdfIn PDF document text
    • https://cdn.sqhk.co/ketusugedi/i1hgia2/naxofoga.pdfIn PDF document text
    • https://cdn.sqhk.co/kowetitemaro/6wjdUjg/juegos_de_shark_simulator_beach_killer.pdfIn PDF document text
    • https://fuvukajewub.weebly.com/uploads/1/3/3/9/133999399/6528591.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/5ebjdgj/figewevobilorawikuwulenu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nonulalomijowo.epizy.com/nofot.pdfIn PDF document text
    • http://sidesapamapa.epizy.com/barbie_logo_wallpaper.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_off000158c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158C9 5184 bytes
SHA-256: 6ffc9aaa702beaf2ebd197e1edc4d2f9835fc480df64f67b4ddc234ab4edf2eb
font_01_sfnt_off00016a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A3D 10856 bytes
SHA-256: 86ed3baa01168b6be2ca841ee68c29a6b653cabdfe8d4777f24d323730020b57

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