Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab7550c37a6b7dc6…

MALICIOUS

PDF

78.0 KB Created: 2021-03-15 21:27:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 47b73f3587a137e635fa1a2eb5374da9 SHA-1: 316ed11ba5b3ac6af34d594469b0bb23abc24559 SHA-256: ab7550c37a6b7dc61d564aa0dc697e771eaf9ff5c18ad0b07138c72dc8f66207
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 0.9996

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 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://dugedepap.ru/123?utm_term=california+dmv+permit+questions+and+answers PDF link annotation
    • https://lowexupunodod.weebly.com/uploads/1/3/4/8/134896298/8357126.pdfIn PDF document text
    • https://sasadopebob.weebly.com/uploads/1/3/5/3/135324308/virup.pdfIn PDF document text
    • http://puwinowelin.medianewsonline.com/journaux_algerie_gratuit.pdfIn PDF document text
    • https://tupeduwexawagov.weebly.com/uploads/1/3/1/6/131607208/pisibuwuxojewa.pdfIn PDF document text
    • https://jirakeleda.weebly.com/uploads/1/3/5/9/135992973/tujutakup-kunade-tuzonome.pdfIn PDF document text
    • http://nasporte1.fun/hoover_air_lite_windtunnel_3_beltjbfka.pdfIn PDF document text
    • http://timelessdecorum.com/24668517150bx4mv.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/sarunafatagalutumu0l80p.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/vanifebelotarasomu.pdfIn PDF document text
    • https://tibufidis.weebly.com/uploads/1/3/0/7/130740046/geselim.pdfIn PDF document text
    • http://pressit.space/8873491527922ey.pdfIn PDF document text
    • https://denogowozule.weebly.com/uploads/1/3/5/3/135326247/cbfb3f1b.pdfIn PDF document text
    • https://fidojosamesevuf.weebly.com/uploads/1/3/4/5/134594598/pixagamip.pdfIn PDF document text
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/2a1f4d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/google_account_manager_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/giwipekusenopeder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c552ed-60b0-4e8d-a951-7200e9a5d89c/dudivopijegedumakowomuv.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/45704552444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41b5fcfc-c818-4f98-98db-8bc520b81051/punctuation_worksheet_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aa962f5-0833-4c53-8862-4181f3059fab/kenmore_ultra_wash_dishwasher_filter_location.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/vebegigadapamefuv.pdfIn PDF document text
    • http://sojufuka.atwebpages.com/how_to_heat_up_tamales_in_a_pot.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_off0000f239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF239 5372 bytes
SHA-256: 24180ee7380e3745b5f9b2e76c273e225c57fb0e6ff02467867a6738360d4510
font_01_sfnt_off00010477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10477 11152 bytes
SHA-256: 25108dc4460764e2acda60272e2a5d7e825e758d92248cb81b4d6da8c8dbadcd

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