Malicious PDF — malware analysis report

Static analysis result for SHA-256 53bf7eeb4c7add2a…

MALICIOUS

PDF

75.3 KB Created: 2021-03-01 10:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d0bafc3488ed2c1ddcc10958c4c73837 SHA-1: 0d47d8b5dba78276abf0c8039c86aec69667a119 SHA-256: 53bf7eeb4c7add2a293cd3730eca50c484704ad1f70e3f6617015ba5c1893783
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The primary URL, https://resalured.ru/strik?utm_term=xotic+ep+booster+v2+review, is likely the destination for users tricked into opening the document, potentially leading to further compromise.

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://resalured.ru/strik?utm_term=xotic+ep+booster+v2+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4530151/normal_5fc6c1edc55d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389570/normal_603b9d406f70f.pdfIn PDF document text
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/6764482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497368/normal_6012f1a112b86.pdfIn PDF document text
    • https://xojozojejaxito.weebly.com/uploads/1/3/4/8/134866115/4082308.pdfIn PDF document text
    • https://powirubojeti.weebly.com/uploads/1/3/1/4/131482959/nizelasep.pdfIn PDF document text
    • https://falufanimuv.weebly.com/uploads/1/3/4/3/134377488/1681017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388407/normal_6018e66a1a2dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413467/normal_5ff27493a1488.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459482/normal_5fc6208bca466.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458840/normal_601867ab7d142.pdfIn PDF document text
    • https://cdn.sqhk.co/tegiriwepaj/iA8jehd/16172818231.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/1940094.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403274/normal_5fe251582f932.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/7Cdjgid/lugikutonorab.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/ehcPQii/22841669396.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393763/normal_5fe47b458a56a.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/au13igE/iihf_world_hockey_championship_teams.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B1 5088 bytes
SHA-256: c953779a8b4d860a5359a4d5bf9ab58e88a4a97872fe949791305925eb531544
font_01_sfnt_off0000fb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB20 10948 bytes
SHA-256: 86d8bf2b5076ac9f7c15a6712f6db602ddcca8278644bdcbd26e472ed3f0eb64

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