Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2fdedacb2d1be6f…

MALICIOUS

PDF

83.5 KB Created: 2020-11-24 04:57:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5481d2b19a4e3a030be8990eb88c7687 SHA-1: 9821a08e334737da39e96db83e912e4bb70dea2a SHA-256: f2fdedacb2d1be6f112320cbd9e52ee7f71c59fe1d9844f6de7a0bd9b06889b6
184 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. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/strik?utm_term=12+critical+things+your+family+needs+to+know+download PDF link annotation
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/warokujejiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369915/normal_5f894556d2dec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408330/normal_5fa59aade1e75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_5faf0bcabd69a.pdfIn PDF document text
    • https://tusovaxurekugu.weebly.com/uploads/1/3/4/9/134900319/1852669.pdfIn PDF document text
    • https://nilorajokurede.weebly.com/uploads/1/3/4/6/134626806/6a8d1dc6e9.pdfIn PDF document text
    • https://jevemiparo.weebly.com/uploads/1/3/4/5/134501543/8425631.pdfIn PDF document text
    • https://luvoseguz.weebly.com/uploads/1/3/4/6/134665560/zemazupagagolifetir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f9c98ffbe6bd.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/2429ccdc-992b-4e11-8cfd-2eac03ea1b20/casarett_and_doull27s_toxicology_9th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a43e9f-003e-4131-892d-977cf6350b54/tipos_de_metodos_cientificos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/451de7f7-374f-4662-affa-4348f90cc9d7/teoria_campo_magnetico_2_bachillerat.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BD 5784 bytes
SHA-256: b9b069c1c7341acdaae50a839112c6c21725296902924a4caa2c034082efd6c0
font_01_sfnt_off0001045c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045C 11388 bytes
SHA-256: c9c25c9a3d2b533cd98fc387412e7a33eee2da66647a581a0c320904ac9e0215
font_02_sfnt_off00012b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6F 16124 bytes
SHA-256: 9c32922910d07d19cd7bddeff83cc84b09fbf8ea92baae28e466c4d18ad6d490

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