Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0d2648fc19d1aa…

MALICIOUS

PDF

75.4 KB Created: 2021-03-04 08:15:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 597d0bf2afb19499bdeb7ddf53b589ef SHA-1: 3e4fefd06e22b1062c0f8df459c5d42737fefd90 SHA-256: 9f0d2648fc19d1aac9f253dd796c20150356c8bc9b0cf8fc10755a166a42919e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical detection for a link farm and a high ML score. The document contains numerous external URLs, with a primary focus on `http://qrettalq.online/zolovifey64tv.pdf`, suggesting a phishing or SEO manipulation attempt. While no scripts were explicitly extracted, the PDF structure and the presence of external links indicate potential for malicious content delivery or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://vilenefex.ru/wb?keyword=best%20portable%20water%20flosser%20uk PDF link annotation
    • http://qrettalq.online/zolovifey64tv.pdfIn PDF document text
    • https://vexibalob.weebly.com/uploads/1/3/4/8/134896466/jegitowezuxa.pdfIn PDF document text
    • https://nuguzawopaji.weebly.com/uploads/1/3/4/0/134040365/suririjepa.pdfIn PDF document text
    • http://apparentlyopt.com/11491423155xg8qo.pdfIn PDF document text
    • https://xibixijuli.weebly.com/uploads/1/3/5/3/135399677/nudovo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388060/normal_5feda991dbe84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391326/normal_600753ac20529.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457592/normal_5ffd9964b43d6.pdfIn PDF document text
    • https://mazefitarunakur.weebly.com/uploads/1/3/1/4/131453858/6865167.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501482/normal_5fcdb90264da1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450734/normal_603db7d5729ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451549/normal_600154fc56b29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wififeju.atwebpages.com/99475673896.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/xusugetesodigetilesin.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/is_tesla_the_first_electric_car.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_off0000ea46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA46 5240 bytes
SHA-256: 68efca0a41d1cbbb6b7829aa364f4ffdd70f441434bd635ff8723faf5929990c
font_01_sfnt_off0000fc3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3A 10944 bytes
SHA-256: 84b71bcdd51b5dd7099587e69073dd2bcb4783ae3911d42bb4585c5985680479

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