Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2caffb7ed46fa31…

MALICIOUS

PDF

74.0 KB Created: 2021-03-09 10:55:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3621426a253888776343d0eea1a795c5 SHA-1: 80fb18bb7a55bd42e9203d2f957fe26274cd96c7 SHA-256: d2caffb7ed46fa3179b5211ca688a2bfaa6dabf4f60fe66fd25548d1028fb4ca
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://ponafet.ru/award?keyword=change+arabic+number+to+english+in+pdf PDF link annotation
    • https://cdn.sqhk.co/wajidafix/DibPn7e/stickman_flip_diving.pdfIn PDF document text
    • http://wejuveziwep.mypressonline.com/livre_pour_apprendre_le_franais_dbutant.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/singer_simple_sewing_machine_issues.pdfIn PDF document text
    • https://cdn.sqhk.co/tolononof/tjfjiFV/under_seat_storage_box_silverado.pdfIn PDF document text
    • https://wusulanapezuvu.weebly.com/uploads/1/3/4/3/134325740/9633232.pdfIn PDF document text
    • http://tumijosejagag.22web.org/94313390872.pdfIn PDF document text
    • https://cdn.sqhk.co/rexazileka/BihirDA/44604289444.pdfIn PDF document text
    • https://cdn.sqhk.co/lemijexo/yjghjN7/pumpkin_panic_rpg_maker_mv.pdfIn PDF document text
    • https://derigogo.weebly.com/uploads/1/3/4/0/134017063/2b3bd6.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/eRihhiL/similarities_between_metaphysics_and_epistemology.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/268fdc15-6bf6-43d8-bd93-277dde3d9896/lakogolotezevisomen.pdfIn PDF document text
    • http://pawekixezad.epizy.com/nelebomepalowarakote.pdfIn PDF document text
    • http://nisogifamesada.epizy.com/canon_lide_700f_scanner_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d36b794c-92f2-4671-9678-54098001467e/sifujem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdd60d0b-6500-4a96-8c65-1ec015b4eab8/my_name_by_sandra_cisneros_lesson_plan.pdfIn PDF document text
    • http://zajakitonen.epizy.com/how_to_get_paid_maternity_leave_in_illinois.pdfIn PDF document text
    • http://mivoxonewume.rf.gd/zijebijefusubuwuxesej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ed896d0-e5c9-4fa1-b88c-610765dd3981/vk_digital_set_top_box_usb_video_format.pdfIn PDF document text
    • http://jasagola.epizy.com/72501083051.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_off0000e385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE385 5612 bytes
SHA-256: 099fe8840b489b4522ef333c5b0d6c530e61b46c4f7c09e209c0cbb792f573a1
font_01_sfnt_off0000f66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66C 10852 bytes
SHA-256: 644dbd66500f16a868bd21b5a4c7cc6ca3dc30cde52b937b4a546d9a8fa2bef7

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