Malicious PDF — malware analysis report

Static analysis result for SHA-256 43af0abd10124829…

MALICIOUS

PDF

77.3 KB Created: 2021-03-08 17:01:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f68b4f4785e3d6b07181a7aed8222f1f SHA-1: 9357eb834841f35cee912baf60032f5ff2778f17 SHA-256: 43af0abd1012482944eb719abc57b1e1f5677ee8c68a1a74fefc9bf032994e05
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/aws?utm_term=cameron+hydraulic+data+book+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373987/normal_5fee2a0ede6af.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/4550850255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_6042e7677169d.pdfIn PDF document text
    • http://narovomesizi.medianewsonline.com/85080020033.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/libro_metodologa_dela_investigacin_cientfica_dr._julio_piura.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/jb7jfc2/usa_hockey_guidelines_regarding_non-_sanctioned_play.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475728/normal_6006e277300c7.pdfIn PDF document text
    • https://cdn.sqhk.co/ratevusur/hhgj8ic/broken_screen_3d_live_wallpaper_iphone.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/fallout_4_mods_without_bethesda_account.pdfIn PDF document text
    • https://cdn.sqhk.co/mejabutumu/whelJTc/walmart_neighborhood_market_moss_bluff_pharmacy_hours.pdfIn PDF document text
    • http://sutarakikim.scienceontheweb.net/76123472793.pdfIn PDF document text
    • http://vopagokiniki.mypressonline.com/ryujin_3.5_cp.pdfIn PDF document text
    • http://vabuzunaseridal.iblogger.org/14409141537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386829/normal_5fdb5c16c8df9.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/bawizokox.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/razuxuxogamabaxovap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474465/normal_601b14d60b33c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_2368509ca10b43d1a933b8c420815d60.pdf?index=trueIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_5c4af7c8878342cea5abe4f0d5f76e2e.pdf?index=trueIn PDF document text
    • http://lusalelafujijo.epizy.com/botonija.pdfIn PDF document text
    • https://20492254-e4a6-4963-b56a-3a655c9f5c8a.filesusr.com/ugd/89b1bc_552deb85542444cc89a7ed22fd9f0845.pdf?index=trueIn PDF document text
    • http://kawozubugomolen.epizy.com/do_garbage_disposal_have_a_reset_button.pdfIn PDF document text
    • http://tipunogat.rf.gd/kung_fu_panda_turtle_gif.pdfIn PDF document text
    • http://geruvidajiraje.epizy.com/wugevu.pdfIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_9fc2c8cc31e04a9da531bd605672a2be.pdf?index=trueIn 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_off0000f01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01B 5520 bytes
SHA-256: af1010583ead8b70c6507e005f50352e0a0743e405c9936e13c8a93673990694
font_01_sfnt_off000102c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C6 10656 bytes
SHA-256: 2f10d42a7771144c8c28ae30a3534e867a4869e41d9642f9f7dff6de4c3bf79a