Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c0fed0b189e452…

MALICIOUS

PDF

79.2 KB Created: 2021-03-20 12:34:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e42fd501ca1ead28e641f4e7d38082b3 SHA-1: 9b7118a1f057941ce0195515bf4ebab48b1be82e SHA-256: e7c0fed0b189e452493d34c67c9d232d89c638cb959c9fa706d87cee533bd6ec
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 0.9998

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://jacksth.ru/award?keyword=application+for+visa+on+arrival+thailand+pdf PDF link annotation
    • http://akfb.online/27811065657w40aj.pdfIn PDF document text
    • http://monoga.space/axis_mf_sip_stop_form4mlkq.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/washington_redskins_rb_depth_chart_fantasy.pdfIn PDF document text
    • http://jufanurozud.getenjoyment.net/59951504113.pdfIn PDF document text
    • http://forisawidokomor.sportsontheweb.net/27353621857.pdfIn PDF document text
    • http://prodson.space/article_15_trailer_mp448je9.pdfIn PDF document text
    • http://copyrighthelpptteam.com/blacks_law_dictionary_free_downloadk95kn.pdfIn PDF document text
    • http://lejifip.sportsontheweb.net/govujexitesajukepijos.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/how_long_does_navy_training_last_in_nigeria.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_00107c9234a44728ae6d3889de25f756.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/how_much_does_an_oklahoma_drivers_license_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0d26ac4-a8a6-4847-af31-baa4b38e6cd5/how_to_make_a_guy_love_you_again_after_a_breakup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eacc134-aea2-4c12-9364-4fdb9a79a953/what_snow_blowers_are_made_by_mtd.pdfIn PDF document text
    • http://futakanawus.onlinewebshop.net/career_guidance_after_10th.pdfIn PDF document text
    • https://b89c0965-50b5-483f-b67e-52f573158f4f.filesusr.com/ugd/1e222e_4542edf94d1848dd8dee68d4a9467efa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/bezokavebobudosew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9d96c53-1c9d-429d-8fd1-0f0d7c64cdda/fubaki.pdfIn PDF document text
    • https://cd70d4e5-4a1a-4071-96d1-f2415ea5ece1.filesusr.com/ugd/7f46b5_3e11a74c41e9468da76f61dc3b541ff2.pdf?index=trueIn PDF document text
    • http://tosurok.myartsonline.com/speaking_english_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98a4f2bd-baec-467c-93aa-c3bb66359268/21816111005.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_off0000f29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29A 5292 bytes
SHA-256: ac567a3a6b75b1b71a746a8b4f018e1949e6f44639de8c193f597a3b31da78e5
font_01_sfnt_off0001049f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049F 12248 bytes
SHA-256: 427157ce0a7aa87eacc7e23f412abedb86028a7f91f05f451c1be14e7893f892

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