Malicious PDF — malware analysis report

Static analysis result for SHA-256 708dc52b7a410594…

MALICIOUS

PDF

65.5 KB Created: 2020-11-30 17:27:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bf3617da6ac456679ec92c4c63638aa9 SHA-1: d7ac467db3334c1a3bb550ecc7c2c1a34fb2757a SHA-256: 708dc52b7a410594105e724c4259a8f4b82caa49615849596b0448fbcd11dcfb
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 0.9998

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://trafftec.ru/123?utm_term=deferred+billing+code+for+roamans PDF link annotation
    • https://lumixiwutetus.weebly.com/uploads/1/3/4/3/134388296/pulepekidaxopu_fofupojixupojiz_vakalan_kaxego.pdfIn PDF document text
    • https://fegoparowewara.weebly.com/uploads/1/3/4/3/134321013/xofejabe-lakaxodaxeketur-rumolufivabidu.pdfIn PDF document text
    • https://pisilobeko.weebly.com/uploads/1/3/4/7/134728547/lepumas.pdfIn PDF document text
    • https://telavepifamika.weebly.com/uploads/1/3/4/3/134352802/gajipakewavurax.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/77c9b0ae-fa61-481d-abd0-1608effe579e/the_ambum_stone.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd07c5b7a66e04eaf66d1d/1606223813520/wezekuzo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe123f61e25426e100b56f/1606292032607/sunbeam_electric_blanket_f2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e88b8139af0376454bd0/t/5fc19de508845d0924c7a530/1606524390373/pokemon_go_download_apk_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10aaaf9866f3fd2d521c0/t/5fc1ab939ee0f32b8791b84c/1606527891528/73677627263.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffbf92e34347c703edab4/t/5fc14646bc819f1cf4070570/1606501959659/60495909473.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/93709934232.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe04403c6ccf69f3255280/1606288448924/amana_microwave_aco1860as_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/babies_r_us_return_without_receipt.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfff89ee0f32b871a0712/1606287353600/jibejus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d9d28787e879896bb85a/t/5fc482014f983757206fd877/1606713858505/the_huckleberry_hound_show_dvd.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_off0000c22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC22C 5480 bytes
SHA-256: 28c886232ea99795b8a4977b825b6a197a726e0260d6519d87ec26de3f22c568
font_01_sfnt_off0000d4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C0 10664 bytes
SHA-256: 6b2a010c1323d3006bcefe71de5c0f8105214ff174d483f19b861f9aaac73332

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