Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ab32816326d8cd…

MALICIOUS

PDF

83.7 KB Created: 2021-03-14 20:17:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e77dd0ddafc79f7ed52cdad24549b3be SHA-1: 93c4268075a1a3042612a81b0aeb121097d0ddd8 SHA-256: 98ab32816326d8cd94d10806a6ee76fa33cfc72cb3977bce973c51e955395191
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/award?keyword=asc+842+pdf+fasb PDF link annotation
    • http://walolexokesufa.sportsontheweb.net/dagatosajivujiduxada.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/does_apple_tv_have_a_remote_control.pdfIn PDF document text
    • http://kuviruvada.getenjoyment.net/wazupisugox.pdfIn PDF document text
    • http://kepuxom.mypressonline.com/what_books_are_similar_to_magic_tree_house.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/luwujupamuxo.pdfIn PDF document text
    • http://serururepus.scienceontheweb.net/swot_analysis_blank_template_worksheet.pdfIn PDF document text
    • http://wovuwukotuvoxi.mygamesonline.org/videkivu.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/dotivaf/nudazinuba.pdfIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_4dfdc2bbb7a24bb09ac5a744d32134f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/338d69f4-62a3-4f5e-a608-43e7755060cc/gedigesumutirizol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f321c27-cee4-458e-8b34-fb909cf194e2/xebulowetiminanalo.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/bernina_sewing_machine_730_manual.pdfIn PDF document text
    • http://tigagatu.atwebpages.com/quaid_e_azam_university_admission_form.pdfIn PDF document text
    • https://9fd4a267-a675-4462-b2a8-34848e7262be.filesusr.com/ugd/3835dd_ec848d75ec5e477c8f656f588ec1ded3.pdf?index=trueIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_b1b32638f7864bb99333bb4e0fd23a31.pdf?index=trueIn PDF document text
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_4869f7e8663f4cd6b1fe3d0f3d53bbac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/minabiwa/plural_nouns_worksheet_grade_4.pdfIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_61a3878e90ba47508d3283e98ccf3a80.pdf?index=trueIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_2797575056494d07992174631bf64c14.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001088b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088B 5564 bytes
SHA-256: bec679a4772e2a5f0a0e8c65042f02908908c5e9c6a55c2904caee16963a4d12
font_01_sfnt_off00011b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B95 11296 bytes
SHA-256: c547a683d9233d61a0df09644ed1a00e6e58e80bbabed1acedf27edb1b26bc83

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