Malicious PDF — malware analysis report

Static analysis result for SHA-256 68748ce7633f68cb…

MALICIOUS

PDF

67.5 KB Created: 2021-03-19 08:36:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3da86a137d5bda69416e3e8c205fc51d SHA-1: 5930496c635ac0d79e510cca0ba0306b403cf9e0 SHA-256: 68748ce7633f68cbf38478e7519e529f422bfeaec7c80ae7b0e370bf3e91181b
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 0.9996

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 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://jumiwimov.ru/wix?keyword=bypass+internet+explorer+xss+filter PDF link annotation
    • http://aycotoro7.xyz/basic_english_speaking_sentencesyxn3i.pdfIn PDF document text
    • https://cdn.sqhk.co/melivetipi/awjdggl/burijuxidipa.pdfIn PDF document text
    • https://zabugejagovim.weebly.com/uploads/1/3/1/6/131637755/falaruluvo.pdfIn PDF document text
    • http://table-wait.com/87009007132g6k31.pdfIn PDF document text
    • http://salonvarna.com/furomepogih6ei5.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxapivasif/iAjiJif/download_mma_fighting_clash_mod_unlimited_money.pdfIn PDF document text
    • http://indir-kazan.com/zegerefubyw3m.pdfIn PDF document text
    • http://alkostore.xyz/64999543607l759k.pdfIn PDF document text
    • http://becloud.website/fegesatarexuvunova1ce5l.pdfIn PDF document text
    • http://lovewaits.ru/ancient_civilization_persian_chart78a38.pdfIn PDF document text
    • http://findssldz.xyz/43424653749gqc0r.pdfIn PDF document text
    • http://sedouche.xyz/supreme_court_amicus_brief_formatzxcff.pdfIn PDF document text
    • http://iminn.ru/vanekijasivphm1.pdfIn PDF document text
    • https://bejasesazopo.weebly.com/uploads/1/3/4/5/134512805/301c4.pdfIn PDF document text
    • http://mandarins.space/fonuroxon1s36d.pdfIn PDF document text
    • https://cdn.sqhk.co/jinuminex/i4KsjgH/55523124016.pdfIn PDF document text
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/vidaruvorap.pdfIn PDF document text
    • http://bachanalytics.com/el_principito_capitulo_10_11_12_resumenhxe3x.pdfIn PDF document text
    • http://mazafaka69pussy.online/romulinivezevoweroviwisegpuczl.pdfIn PDF document text
    • https://sikediluselifa.weebly.com/uploads/1/3/1/6/131636826/a9dc2b978.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/69a5cf5e-802b-432c-ace2-3e58a3572f83/52573108836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4179564-2dbc-438e-bdfd-3deffed568f9/how_to_clean_a_cuisinart_waffle_maker.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_off0000c9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F5 5116 bytes
SHA-256: ab3532940828fa4114cec2d59cffd6c1b27498b4d50493293945dfcbc561b338
font_01_sfnt_off0000db7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7C 10308 bytes
SHA-256: 3053a2a004c1013af91eee26e903246e0451104269b7078790fbbd3c008024b5

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