Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a6c8f75671577a1…

MALICIOUS

PDF

74.5 KB Created: 2021-02-26 18:53:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8d1f6f727a2e7622a92068885bd81c9a SHA-1: 4fb1c471be6dc419184dcd406de1d9ad6d932c2f SHA-256: 2a6c8f75671577a136b71ce05dea6ac9cc91800a5aab23c3082e26ae7496b299
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that directs to a domain associated with link farming and potentially malicious content. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detection confirms it as a phishing trojan. The document body, though heavily obfuscated, contains keywords related to the embedded URL, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://druttle.ru/award?keyword=how+to+replace+bulb+on+epson+powerlite+83 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489599/normal_601e642f6ea2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370540/normal_5fc620609e277.pdfIn PDF document text
    • https://cdn.sqhk.co/kokedipemi/bgghhja/ben_10_minecraft_mod_apk_download.pdfIn PDF document text
    • https://wurivebufe.weebly.com/uploads/1/3/0/8/130874680/datijeludazig.pdfIn PDF document text
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/zapoxug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479445/normal_6015a5ba54599.pdfIn PDF document text
    • https://sutofuwanunow.weebly.com/uploads/1/3/0/8/130874369/03d1ed4.pdfIn PDF document text
    • https://pesegomogela.weebly.com/uploads/1/3/4/7/134700410/c3e7144971407e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448121/normal_5fd9adcd596ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459636/normal_6013dbc6ec4ae.pdfIn PDF document text
    • https://woteginawewe.weebly.com/uploads/1/3/1/3/131379999/8926252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383573/normal_60244b63936fa.pdfIn PDF document text
    • https://bolowotusupiwam.weebly.com/uploads/1/3/5/3/135300352/5161038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_602c2c92ebf46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368998/normal_5ff609e303856.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/hdL4d6H/81517283997.pdfIn PDF document text
    • https://ginuwedisifixel.weebly.com/uploads/1/3/4/7/134744372/pitozopak.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/davawina/uc_browser_9._5_version_java_app.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/nordictrack_cx_938_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/pigeon_guided_anti_ship_missile.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_off0000e4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A6 5480 bytes
SHA-256: 5b419c378911bfb0b3bcd9c65c3df8ed9a8c5be7698964dc0690c8371a182de6
font_01_sfnt_off0000f75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75A 10940 bytes
SHA-256: 8439c3dc1e4f32981c459dcd34af7c6db74c2ade13970249a9aaea9f9a0d4ee3

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