Malicious PDF — malware analysis report

Static analysis result for SHA-256 4daed8a1c92093f1…

MALICIOUS

PDF

75.5 KB Created: 2021-04-02 21:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fe39e5613a069b169670b523fc35a9bd SHA-1: b10d45c5c3789b7a4e815025f174ff016b752f89 SHA-256: 4daed8a1c92093f175788d8ada846af6d991b3a7f90569369c55187d3eda6664
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://xajibur.ru/123?utm_term=l.+r.+d.+c+full+form PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446390/normal_5fff6dc995e24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486221/normal_603fda355817e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5fd311b3c6067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_602432a7778d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462093/normal_5ff155daf28c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370068/normal_60091492ad6dc.pdfIn PDF document text
    • http://mutugupepu.iblogger.org/xejosot.pdfIn PDF document text
    • http://jawazapefaxuzit.mywebcommunity.org/9357654442.pdfIn PDF document text
    • http://nurigoluda.mygamesonline.org/brownian_motion_in_finance.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419441/normal_601a19f75f14b.pdfIn PDF document text
    • http://jurabosuw.22web.org/gobofalolobiwavakus.pdfIn PDF document text
    • https://cdn.sqhk.co/mojerakikav/cI2haig/skulduggery_definition_etymology.pdfIn PDF document text
    • https://cdn.sqhk.co/jimikafede/KiajIZl/yoob_games_1000_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sabixukavizom.myartsonline.com/truist_bank_address_for_wires.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/836c6cb3-8ebe-44ee-8b58-c1a5e865ae0e/panasonic_customer_support_phone_number.pdfIn PDF document text
    • http://kunijudodo.rf.gd/vans_old_skool_altas_plataforma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c969da9b-a5ad-49b6-8fc7-5cee4cec7cc2/libro_el_principito_gratis_online.pdfIn PDF document text
    • http://zevideto.rf.gd/phet_forces_and_motion_worksheet_answers.pdfIn PDF document text
    • http://xorinonaf.rf.gd/fuzuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e87189c-2718-4ff4-a3e8-2e3dfb661f64/10_x_10_grid_image.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8afd6507-986c-43d4-b4b9-79af7c12883c/24183797919.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

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_off0000ea82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA82 4752 bytes
SHA-256: 0c639b0bb5dc31eb806929c3b903af63c19e971b0c998c57e29baa71ea1b22b1
font_01_sfnt_off0000fa9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9B 11248 bytes
SHA-256: 7401aa37e32a19f4f95b23095445dd85e216bf62de0e2349c7f2ad74d0ddaadc

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