Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0716a61027eeb1…

MALICIOUS

PDF

76.7 KB Created: 2021-01-04 01:31:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 918e9a3ede0670dbd66934ede5cd040b SHA-1: 62a607fea155fc74754dc613a9ec8cb56ef25ca2 SHA-256: 8c0716a61027eeb1eedfd18c66c728d2c71cc2f0d5db6b4aea3f8aa43fa175fd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially malicious content.

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://trafffe.ru/aws?utm_term=my+pillow+giza+cotton+sheets+reviews PDF link annotation
    • https://cdn.sqhk.co/zexoribuj/hdhe5ij/spotify_for_artists_distrokid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470975/normal_5fdf1352d76f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383128/normal_5fee2c170c8e1.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/ijjbvh4/rebuild_gast_vacuum_pump.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369653/normal_5fe27fdc7958e.pdfIn PDF document text
    • https://cdn.sqhk.co/rolekixawute/ikEijZr/mazisibefezo.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/ict4wDX/puppy_wallpaper_hd_new_tab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_5f95df936e0be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377098/normal_5fc3b736458b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425211/normal_5faa676588c9a.pdfIn PDF document text
    • https://cdn.sqhk.co/jogujufuza/hiajciM/vozedafogerixajod.pdfIn PDF document text
    • https://nupuwuzom.weebly.com/uploads/1/3/1/4/131438231/zovisemimodiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/leributafa/befirusob.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/3058345931.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/36701649915.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

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_off0000eccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCD 5504 bytes
SHA-256: 9e4fad5096ff9bdf907611202a6fef4f994a300d92ac64155c3b11d94e89117f
font_01_sfnt_off0000ffb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB8 11156 bytes
SHA-256: c86bb581d8d3609797c019a12a27ae66cc557b0c0cbc7b6a19b52432caeedee2

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