Malicious PDF — malware analysis report

Static analysis result for SHA-256 559f0cd737e20491…

MALICIOUS

PDF

84.9 KB Created: 2021-04-04 09:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fd1442ae2958e4a1859c3adbdd95f357 SHA-1: 0842bef9c08952e2ce138e76b3923416b09bc682 SHA-256: 559f0cd737e204917f0f9988476742a9074c0f0f4f7fa4a3f2cbf072cc1dcf77
186 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to redirect users to numerous external websites, masquerading as 'platformer games 2018'. The heuristic firings indicate a high likelihood of malicious intent, specifically related to phishing and SEO manipulation for malicious purposes. While no scripts were directly extracted, the structure and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://resalured.ru/123?utm_term=platformer+games+2018 PDF link annotation
    • https://kolenogu.weebly.com/uploads/1/3/1/8/131871799/kukeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385214/normal_5fcf2832b60cb.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/18261484603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370097/normal_6041bf73113fa.pdfIn PDF document text
    • https://voxisazemiruza.weebly.com/uploads/1/3/1/8/131871554/nugudofokavu_dukop_lubibegejibo_lugakawazodij.pdfIn PDF document text
    • https://wulelosen.weebly.com/uploads/1/3/5/9/135992808/juzeritudipojeb.pdfIn PDF document text
    • https://pawapuso.weebly.com/uploads/1/3/4/3/134312868/2259336.pdfIn PDF document text
    • http://kotudekudoges.getenjoyment.net/somovajevogerene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497346/normal_60338e603210b.pdfIn PDF document text
    • https://kuxapularutamux.weebly.com/uploads/1/3/5/9/135984678/ca81ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485448/normal_6037cf988d51d.pdfIn PDF document text
    • https://najuxobetejip.weebly.com/uploads/1/3/4/2/134265875/6950342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469863/normal_605d76ec65ce6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384050/normal_6039bc2babaf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454171/normal_6068d815ecd9a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_58d7bca9e7434a0fb8e184e3df8daea8.pdf?index=trueIn PDF document text
    • https://fed4949e-3809-4fc0-a28b-84c5d390f589.filesusr.com/ugd/94482e_9209c909d9b449a3b004e9ff4e34d26d.pdf?index=trueIn PDF document text
    • https://264cdfe8-48fc-440e-bff3-938583425051.filesusr.com/ugd/cd20dc_d959d5c1014b44eb9d6fbe8939c4c389.pdf?index=trueIn PDF document text
    • http://gototura.myartsonline.com/john_deere_44_snowblower_gearbox_oil.pdfIn PDF document text
    • https://3789e5f8-265e-48cd-8836-241a044b7ceb.filesusr.com/ugd/45ef7e_6bd75e7c7b9b4c2c85e8128c8b1a2806.pdf?index=trueIn PDF document text
    • https://466f9527-ada3-48b4-ac0c-4ba5546996ca.filesusr.com/ugd/a4b6b9_92286a29a33643e8b059106c38feef60.pdf?index=trueIn 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_off00010e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E77 5608 bytes
SHA-256: 2b2933899683cc038836149d454f71fd46bc2d78d8e2bd5d18f06b73ddadcc08
font_01_sfnt_off0001217e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217E 10920 bytes
SHA-256: d625f929ee55a8c8154b29ae7f23e89dcb02d1fc522fc8811992ed0d3e357846