Malicious PDF — malware analysis report

Static analysis result for SHA-256 43a2ae7945133b22…

MALICIOUS

PDF

77.7 KB Created: 2021-03-28 16:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: aa84a8841395d2998ff30841f9190fb1 SHA-1: 5601edecc6f78563527fb7ee6774a73c440b2f33 SHA-256: 43a2ae7945133b2265cd64f2dce77358b5fa16311e51a97a3997bd9d4a627e7c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/123?utm_term=formation+of+barium+sulphate+precipitate+experiment PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416802/normal_602546030132e.pdfIn PDF document text
    • http://palaxofivuleduj.medianewsonline.com/34641573725.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/eFja8hd/77767004608.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/Lhb5idM/avaya_aaep_admin_guide.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/what_does_cutting_for_stone_mean_in_the_hippocratic_oath.pdfIn PDF document text
    • https://cdn.sqhk.co/jagojixego/gR52The/racing_games_free_download_for_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/i68hfic/hago_lite_online_game.pdfIn PDF document text
    • https://cdn.sqhk.co/rasidepad/hfnY8jg/87556026830.pdfIn PDF document text
    • https://cdn.sqhk.co/jaselavujuwi/feMjjjj/woodshop_tools_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413564/normal_5fe468e8ad46c.pdfIn PDF document text
    • https://cdn.sqhk.co/jimevexir/jaB4mgj/addons_maker_for_minecraft_pe_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kisunika/iazjjhf/xakekuxozetofi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418170/normal_601486bb9e1fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455403/normal_600e93d0d8e51.pdfIn PDF document text
    • https://cdn.sqhk.co/nibijegun/mNxgchd/papers_please_wiki_apartment.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497346/normal_60293b811098b.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://guwaxilajoxeza.onlinewebshop.net/axilla_anatomy_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/autonics_mt4w-_dv-_41_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/dawisikifuri.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/efficient_frontier_in_excel_spreadsheet.pdfIn PDF document text
    • http://xipanizi.myartsonline.com/lingus_bass_tab.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_off0000e601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE601 5300 bytes
SHA-256: e426c33729032768e1a53447cb6728eba47218c08e47031e87333a5aa6b451be
font_01_sfnt_off0000f7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D6 10212 bytes
SHA-256: 330c22739fd1112eacd994d3799c6e6d0c1a46fa677ed2d84b7b50eb0908a8d1
font_02_sfnt_off00011ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.