Malicious PDF — malware analysis report

Static analysis result for SHA-256 17dc871cbd6f5013…

MALICIOUS

PDF

81.0 KB Created: 2021-04-04 17:34:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4e21c91d1a37aa4ecce98acaa223183f SHA-1: 85160e86aa8c1798f081beb209b050f681cad874 SHA-256: 17dc871cbd6f5013370e65d3f465387e979db429bb53cf9619546365e1a8b574
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 0.9993

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://bologen.ru/strik?utm_term=como+monitorear+mi+red+wifi PDF link annotation
    • https://cdn.sqhk.co/xixumobun/ejahhhj/wallpaper_hd_android_mobile.pdfIn PDF document text
    • http://vuletotam.scienceontheweb.net/advaita_ashrama_books.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/OL3jiih/undersea_power_cable_map.pdfIn PDF document text
    • https://gorasanoso.weebly.com/uploads/1/3/1/8/131859135/3020780.pdfIn PDF document text
    • https://cdn.sqhk.co/nimawabej/gZhcnfY/86140355545.pdfIn PDF document text
    • http://xatovapotogu.mywebcommunity.org/bomimedemomilereletunide.pdfIn PDF document text
    • http://winatesef.sportsontheweb.net/25894313442.pdfIn PDF document text
    • https://xuxefakeni.weebly.com/uploads/1/3/4/2/134234722/a4f4a.pdfIn PDF document text
    • http://gaximivotekole.mypressonline.com/vuwaxanubofabapu.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/Njduidp/73536814817.pdfIn PDF document text
    • https://cdn.sqhk.co/lilokimoz/n0sziRC/waiver_release_and_assumption_of_risk_form.pdfIn PDF document text
    • https://ponawexem.weebly.com/uploads/1/3/2/7/132740185/pudekum_zetuzekijune_juxesowag_bebegazeretu.pdfIn PDF document text
    • http://napodosawukezob.getenjoyment.net/classical_guitar_arpeggios.pdfIn PDF document text
    • https://vugogirofezufus.weebly.com/uploads/1/3/4/3/134355312/zatokadobaroza-banonozit-muwevizuxa.pdfIn PDF document text
    • https://sonikegusu.weebly.com/uploads/1/3/3/9/133997348/fojaxegivemege.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/sapadaw.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/norcold_refrigerator_quit_working.pdfIn PDF document text
    • https://zovipimisog.weebly.com/uploads/1/3/1/1/131163747/8283493.pdfIn PDF document text
    • https://xososikanezav.weebly.com/uploads/1/3/4/8/134892973/3236123.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xidalagep.myartsonline.com/68925450170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4e13e3c-871f-46e4-a9e8-3603324230d4/how_much_does_a_writer_earn_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dadb0370-b8c5-4f49-85d0-de64a7eaeaaf/khalil_gibran_profeta_matrimonio.pdfIn PDF document text
    • http://kuwitabetegipo.myartsonline.com/92001947601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/198061d7-4e1c-47d9-aafb-6816c5e644c3/how_to_set_render_distance_in_minecraft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eaa34d3-a237-4067-aead-dec82d7e658b/tetavokinenukebevixeduka.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_off0000ff12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 4840 bytes
SHA-256: 01c2691df95de6fddb7c29b6011aeb4991644f80d2818439c1323b4670918e63
font_01_sfnt_off00010f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7C 11976 bytes
SHA-256: dcae7be20b03906158e0a591deda90b58cab21c20b02eb89d5790a4cae4968da

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