Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca63b6aead9bf0c…

MALICIOUS

PDF

79.7 KB Created: 2021-05-01 21:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5e0a1dd3007c77f05034751afd4c49aa SHA-1: b746b7dbea8c1a52a013ab7f721f74074f4ea4ad SHA-256: eca63b6aead9bf0c4c3bc7db58898ced2a0784ac625ba45e0d251a0ea38afd55
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 0.9997

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://bologen.ru/strik?utm_term=what+books+are+good+for+8th+graders PDF link annotation
    • http://fikitenifazela.iblogger.org/wigefisogi.pdfIn PDF document text
    • http://govnososal.xyz/kambal_katinig_o_klaster_worksheetv8m3z.pdfIn PDF document text
    • http://wiwikiru.iblogger.org/14499608675.pdfIn PDF document text
    • http://rabizepafuxonag.mypressonline.com/wanadizejedezaxom.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/jjaaLtB/mt_rushmore_hotels_marriott.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451742/normal_5fe3c3eb7efb2.pdfIn PDF document text
    • https://cdn.sqhk.co/nananava/mjbhb9Q/96002330598.pdfIn PDF document text
    • http://mokaxizekebade.scienceontheweb.net/formulas_para_el_volumen_de_prismas_rectos.pdfIn PDF document text
    • http://pesale.pro/bijinupitesupamapalud6p9b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450507/normal_5fe0516b3574e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_602545a42de75.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/iiOZHge/animal_cat_ringtone_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375514/normal_600bf01359b7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5fd6581115c8d.pdfIn PDF document text
    • http://radapox.iblogger.org/rf_amplifier_design_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452834/normal_602a0c1921a3c.pdfIn PDF document text
    • https://cdn.sqhk.co/pawiwodogu/9jgV1l2/change_password_outlook_app_android_office_365.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_603e49c82d74c.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/10414432897.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379482/normal_5fcfacb0e8994.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gafijid.atwebpages.com/59038392177.pdfIn PDF document text
    • http://degedudu.rf.gd/formal_letter_writing_topics_for_grade_7.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_off0000fb50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB50 5548 bytes
SHA-256: 22ea4af048b597504ea9f30d9239ad561eb56559aba154b4dcd20e2ae33ecd75
font_01_sfnt_off00010e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E32 10364 bytes
SHA-256: 2467e1c0e28086b1cafe8494d47358abe7b5ef0e3e1364df3685d9ac2d41ff11

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