Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0395c1c2722de0…

MALICIOUS

PDF

45.7 KB Created: 2020-07-09 22:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: fdb5ec5d277fbf70015137051457f5ee SHA-1: 71cc68bc6f45fcabedec5fd55fc19c7452d1ae13 SHA-256: 5f0395c1c2722de0ac610898d3afa510a80744e9386facbc1dec2ea348ceef48
184 Risk Score

Malware Insights

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

This PDF file is identified as malicious due to its extensive use of SEO link farming techniques, embedding numerous links to disposable domains. The document body, while appearing to be a user manual, contains a primary URL that redirects to a malicious site, likely for SEO spam or phishing. The ML classifier strongly supports the malicious verdict, and the heuristics indicate a deliberate attempt to create a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.com/wb?keyword=openshot%20video%20editor%20user%20manual%20pdf In PDF document text
    • http://files.clinicamenta.com/uploads/1/3/0/7/130775982/wogugop-sinumozeze-libivupinitu.pdfIn PDF document text
    • http://files.bosfchounds.com/uploads/1/3/1/6/131637255/7558901.pdfIn PDF document text
    • http://files.woutervanheesphotography.com/uploads/1/3/0/8/130813558/boxodejulog_jesap_xaxotoxalawin_vaziji.pdfIn PDF document text
    • http://files.upperclementscottages.com/uploads/1/3/1/4/131408864/65544.pdfIn PDF document text
    • http://files.ghostandribbon.com/uploads/1/3/0/7/130775870/c78a6717ae2b66.pdfIn PDF document text
    • http://files.canalsigling.com/uploads/1/3/1/3/131383018/8717392.pdfIn PDF document text
    • http://files.lockmangenetics.com/uploads/1/3/0/7/130775383/nizejab.pdfIn PDF document text
    • http://files.turosmathclass.com/uploads/1/3/2/8/132815118/85ba701b.pdfIn PDF document text
    • http://files.tarotartist.net/uploads/1/3/2/6/132681938/8280551.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://napipivo.files.wordpress.com/2020/06/mudizabajut.pdfIn PDF document text
    • https://gorebekox.files.wordpress.com/2020/07/37886029491.pdfIn PDF document text
    • https://josejoxoboko.files.wordpress.com/2020/06/tegilalanitogogalokuro.pdfIn PDF document text
    • https://nikemisar.files.wordpress.com/2020/07/xisajunadimu.pdfIn PDF document text
    • https://lusenexovaj.files.wordpress.com/2020/07/vexitagigow.pdfIn PDF document text
    • https://nezikip.files.wordpress.com/2020/07/xugomugefaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tanedikefiresemur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3183641906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovaje.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_off00006af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF4 5248 bytes
SHA-256: c0749e86dcfbe67772e46a4bd10696e9f49dd34d0e6de8192946c4a9f137d1e5
font_01_sfnt_off00007c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9D 14700 bytes
SHA-256: 28dd8864b8787bb5f3ba20080509ad84d3196b0310c2f91609d9fa4e9a36322b

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