Malicious PDF — malware analysis report

Static analysis result for SHA-256 2397a6137026f1ac…

MALICIOUS

PDF

80.4 KB Created: 2021-05-23 22:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f8c38f5d4d235882ea35c7aeb5722b33 SHA-1: 1eacf449ce3e1e2e3e2511213ad192513208aa2f SHA-256: 2397a6137026f1ac675b503c6869c0e986e7d9a56b10abd24b5e59f1b2313e73
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://ponafet.ru/strik?utm_term=can+coin+master+be+hacked PDF link annotation
    • https://vavinaxedekofew.weebly.com/uploads/1/3/0/9/130969509/0d11beda34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455914/normal_5fdc1785356f9.pdfIn PDF document text
    • https://kulufitobapesad.weebly.com/uploads/1/3/4/4/134443603/8216836.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409403/normal_60016038a39e7.pdfIn PDF document text
    • https://sezalufuveded.weebly.com/uploads/1/3/4/3/134389043/b81d38e6398fae.pdfIn PDF document text
    • https://zokemubolito.weebly.com/uploads/1/3/4/8/134895641/xetow-runaxugifa-feromolute-tomagolusajad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453328/normal_604a1904460d6.pdfIn PDF document text
    • https://tukixetijire.weebly.com/uploads/1/3/4/3/134314539/netexi.pdfIn PDF document text
    • https://pobolibawawo.weebly.com/uploads/1/3/1/4/131437087/19e0137463cc.pdfIn PDF document text
    • https://dewokazivefin.weebly.com/uploads/1/3/1/4/131437233/temunobimasuno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422897/normal_604d447aba0bd.pdfIn PDF document text
    • https://numurivigafezu.weebly.com/uploads/1/3/4/3/134390613/2479805.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453741/normal_5ffbaf20e3dee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411935/normal_600fb3b33cf44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466146/normal_602f41fd5849c.pdfIn PDF document text
    • https://dajurejew.weebly.com/uploads/1/3/4/7/134753869/kiromikatarix_bolapo_kududinuxipe_pivomepovobapag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd96b7c1-6565-4c15-a369-7483e21f649f/hot_briquetted_iron_manufacturers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eb8b2bd-5f45-4470-8b73-df014bba4579/7435164016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f785460-d818-4fc9-be1a-be1da330ca7c/kapepanosifakexadapu.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_off0000fb12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB12 5256 bytes
SHA-256: 7e54f4083d3a0ac75a852642cd14134bcf768ab23c3b50cb2cd6b1c210257c1d
font_01_sfnt_off00010cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBD 11300 bytes
SHA-256: 92888203f9ae93f37795c26c552ce874081b223ed189745530cdcf7b57db4778

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