Malicious PDF — malware analysis report

Static analysis result for SHA-256 87f7b746a354fe08…

MALICIOUS

PDF

71.8 KB Created: 2021-01-19 14:22:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 45db5fe89e3a49672373fd2bb1e7b7c7 SHA-1: 7cadbb39fbcdc47f404eb79b7e7112ac63fc4334 SHA-256: 87f7b746a354fe0828d51865ab14bc0c775033765fc6c188192e2dc2cb0e6608
194 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download' button lure further supports the malicious intent. ClamAV detection and ML classification confirm the malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • 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://baarspo.ru/123?utm_term=100+deadly+skills+survival+edition+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/jenetuwuda/jjhjihW/10831320887.pdfIn PDF document text
    • https://vebuwume.weebly.com/uploads/1/3/5/3/135349689/57d79f2baf28.pdfIn PDF document text
    • https://tiruvodeg.weebly.com/uploads/1/3/4/8/134892329/e793a.pdfIn PDF document text
    • https://lewezuwarekizes.weebly.com/uploads/1/3/4/0/134040914/ee8adf09a180ef1.pdfIn PDF document text
    • https://wubeponasi.weebly.com/uploads/1/3/1/6/131606197/1919878.pdfIn PDF document text
    • https://taguraridefukal.weebly.com/uploads/1/3/4/4/134446716/6903512.pdfIn PDF document text
    • http://naziniza.22web.org/d_d_5e_volo_s_guide.pdfIn PDF document text
    • https://papuxivosep.weebly.com/uploads/1/3/4/4/134491017/mobipawik.pdfIn PDF document text
    • https://sekikeke.weebly.com/uploads/1/3/4/7/134739811/9570342.pdfIn PDF document text
    • https://wekonopu.weebly.com/uploads/1/3/4/8/134848362/dafb965e61ea2.pdfIn PDF document text
    • https://cdn.sqhk.co/totudavomud/nidjaia/64979885150.pdfIn PDF document text
    • https://menedusuwoguv.weebly.com/uploads/1/3/4/6/134699995/28687c.pdfIn PDF document text
    • https://rugaxiloved.weebly.com/uploads/1/3/4/3/134305568/60a8a5ee1dc0.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/1uYxeZL/gibogolewipipana.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xegubidutanaza.epizy.com/sitixilovofafotamopaku.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/28866286339.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/free_lagu_armand_maulana_sebelah_mata.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/xumirozomifibelalan.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_off0000d8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DB 5452 bytes
SHA-256: 739c544c05eab0647f3655c7e607b6b3b7357b1b318baedf09235c924481b3f6
font_01_sfnt_off0000eb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB96 10788 bytes
SHA-256: 92689a08b2d3ca01a87b28bdbbf53ddd44a718fc0c5177f1bee786d6e3c91a1d

Open this report in the interactive analyzer, or submit your own file for analysis.