Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4f89d97a055031…

MALICIOUS

PDF

67.5 KB Created: 2020-12-14 23:50:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d636a576a64acae1f378014c0da5ba1 SHA-1: 4356e199c5c2a7b2e328f9389521b6d534a0fe6a SHA-256: 0d4f89d97a055031014e08866ae4fa2b06d2900c7513f06a0648ca79f218ad75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or a method to distribute further malicious content. The primary external URL identified is 'https://traffnew.ru/123?utm_term=bodies+of+water+in+canada', which is likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=bodies+of+water+in+canada
    • https://bakukumi.weebly.com/uploads/1/3/4/4/134437371/velipusek.pdf
    • https://vesekukoluvili.weebly.com/uploads/1/3/4/7/134759730/d0650c76.pdf
    • https://pixijitawe.weebly.com/uploads/1/3/4/5/134593468/lufedizovupitukewu.pdf
    • https://japiravonasuv.weebly.com/uploads/1/3/4/6/134644749/zesumenazakekeguwu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/subud/58628624179.pdf
    • https://static1.squarespace.com/static/5fc0f988e2fce462bc8c518c/t/5fc65418a97599144ed0a72b/1606833178735/48669912190.pdf
    • https://uploads.strikinglycdn.com/files/9ecdeb5c-9c46-40a5-a28b-45a0e6ac93a7/la_suite_de_fibonacci_explication.pdf
    • https://static1.squarespace.com/static/5fc791041a9b7f6479384afc/t/5fd60deac4373837b9016fd3/1607863793567/serebegevuvetulofore.pdf
    • https://s3.amazonaws.com/vapelurowar/pf_balance_check_android_app.pdf
    • https://s3.amazonaws.com/jamokaroxoj/cp_plus_cctv_price_list.pdf
    • https://s3.amazonaws.com/dubiditiginowo/mensagem_fernando_pessoa.pdf
    • https://s3.amazonaws.com/varoximu/schistosoma_japonicum_indonesia.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cab0.bin
6421fe9c78dc69147f96afb90cd404cc8162d05295bc440bbfb94131b51cd050
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB0 5124 bytes
font_01_sfnt_off0000dc41.bin
f6144da4e2b59cbf2017e2fb192acc3977d0d91aaa9f9359482670f7d70a9a4f
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC41 11856 bytes