Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae96253024305fc4…

MALICIOUS

PDF

87.8 KB Created: 2021-03-24 18:27:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58958fc7991c80ff055fe54e60cae51c SHA-1: 70d133103c070eac428db8fbec11d563891f26fa SHA-256: ae96253024305fc4358c1a16c5bd5adeb9f7ac8f99bb1c6f1771b95c542ff89d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains, indicating a link farm or content distribution network. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious or SEO-manipulated content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/award?keyword=math+symbols+name+pdf
    • http://zujadise.scienceontheweb.net/95145141769.pdf
    • https://garujidizog.weebly.com/uploads/1/3/1/3/131398488/bekugidajonexiboba.pdf
    • http://leoidet.xyz/luzotawinibexudukiloparern4liy.pdf
    • https://xidazujagavoza.weebly.com/uploads/1/3/1/4/131453269/0884fd.pdf
    • https://bulumivivowusip.weebly.com/uploads/1/3/4/6/134667270/wonigaf-guxifasiruvab-damaripisugew-ridawi.pdf
    • https://ponivigaxuk.weebly.com/uploads/1/3/5/3/135313456/2347eb93df9eb5.pdf
    • http://urott-hu.com/bidijukonasovaf74nsl.pdf
    • https://cdn.sqhk.co/gixejefi/hdjb8cz/flights_miami_to_lax_one_way.pdf
    • http://dasiwujupuna.sportsontheweb.net/tipuxofiwejowizixopugij.pdf
    • https://cdn.sqhk.co/zegetaru/BTheijL/xawakiwesigutujumagulet.pdf
    • https://naguxamo.weebly.com/uploads/1/3/4/6/134655503/b3cdc.pdf
    • https://bisubobotikimix.weebly.com/uploads/1/3/1/4/131438323/fibezujakolomezo.pdf
    • https://cdn.sqhk.co/bemaxopig/pgemij8/flight_pilot_simulator_3d_hack_apk_download.pdf
    • https://xanikijopido.weebly.com/uploads/1/3/4/7/134738407/nenopexakukazewak.pdf
    • http://lemafesopeposuz.mywebcommunity.org/dilixemumagoz.pdf
    • https://marutonekuposew.weebly.com/uploads/1/3/1/6/131606360/94f1eafbef04.pdf
    • http://zonerokemub.getenjoyment.net/adjective_clause_grammar.pdf
    • https://kufoxigokutef.weebly.com/uploads/1/3/1/8/131856815/musebizesuw_bilebole_nozirakeka_turotuxubifipe.pdf
    • https://cdn.sqhk.co/podogule/02hggit/download_game_ultimate_motocross_4_mod_apk.pdf
    • https://cdn.sqhk.co/lunosupi/mboGwjd/tumblr_wallpaper_pink_pastel_colors.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/cc4710bb-d0fe-4ac8-8259-b33740b2af9c/temas_de_historia_que_caem_no_enem.pdf
    • http://fajazimigig.atwebpages.com/garmin_oregon_650_manuale_duso.pdf
    • https://uploads.strikinglycdn.com/files/8bed92e4-45da-4985-b0c4-5814e961ba1b/damasio_the_strange_order_of_things.pdf
    • https://uploads.strikinglycdn.com/files/c4ba5ed7-dd9d-4cce-97eb-a13984d29d02/tupekif.pdf
    • https://uploads.strikinglycdn.com/files/735c2250-04bc-47f3-a3ee-922e25662026/43610716201.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010750.bin
dcdd464fb6e514db34e7aa2638c81cbbd340634d78985b413c94b9362d54fc00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10750 5172 bytes
font_01_sfnt_off000118c5.bin
5c04abdcda46a92ef0ad158e923e0f7f0a85ce749375f64c6f103368a85cba3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118C5 11928 bytes
font_02_sfnt_off00014175.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14175 4324 bytes

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