Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47176c64ae7da91…

MALICIOUS

PDF

77.0 KB Created: 2021-05-27 22:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0d7d0d1584bb0723fefad0f927f23d99 SHA-1: dfbf704530e6fa5f0a537534ef9f9a0f80a73f96 SHA-256: c47176c64ae7da91ef4b6047d2180b80ea733da8dc0e984357e0505c47507599
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://seumenha.ru/strik?utm_term=how+to+test+paint+adhesion PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424696/normal_6040b0843fedf.pdfIn PDF document text
    • https://telumenodizoxop.weebly.com/uploads/1/3/4/2/134266327/2528459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377115/normal_606e48efcb402.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477386/normal_600f5a850f771.pdfIn PDF document text
    • https://pavuxutekukos.weebly.com/uploads/1/3/4/7/134704216/9180a4f948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377697/normal_605f441d4a012.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/8757628.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447914/normal_60540b947bf38.pdfIn PDF document text
    • https://donaleta.weebly.com/uploads/1/3/4/4/134481941/8421191.pdfIn PDF document text
    • https://rapusixub.weebly.com/uploads/1/3/4/6/134631860/fifokazojite-roxofapukep-nitom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/75e11282-504d-4d36-b2a8-2a905c2261ad/keluzijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70949f58-83c2-4ad4-81c7-589e712c139c/xidaxusajofudokodetir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a93b470-26a2-47cd-b7eb-38fbd8ac5f4d/davujetajorepaxes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/137ae38b-dafe-4fb5-9c32-66ae2fe49988/jigixukifovogixediz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f3cfc2a-f39a-45e2-b274-4b6ef893a9f0/tom_clancy_jack_ryan_novels_in_chronological_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/998db40f-29dc-4bb2-a626-8290f19cb6d7/robin_hood_festival_nottingham_castle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fffbe370-f674-4f83-804e-a7dee3647b75/microscope_parts_quiz_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/675f1e11-bc67-4efd-9ed2-8824c696194a/gta_5_online_pc_free_mod_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fcdb786-1755-4f5f-9129-7fc920ba0a1c/nordictrack_cx_925_elliptical_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccde96a8-ccf1-4bbe-9037-9f6d2297d0af/vadeleripekiforugova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1378df98-48e0-49e1-afdd-e701199d0679/why_is_my_oven_not_turning_off.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48402cee-5737-4ddb-a75f-38441e04e30c/dosimizomuxaluraguv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32aefa8d-5993-4635-a670-3c56cf9a7566/system_dynamics_ogata_4th_solution_manual.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_off0000f096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF096 4972 bytes
SHA-256: 5f07f9956d837ad730636d5124522f375436d82b3f8023475a572d0f9de290d9
font_01_sfnt_off0001018a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018A 10828 bytes
SHA-256: cef040786b30c6b27091eb6c5f34448b176ad641e59dc7ad878563dbed7d7b95

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