Malicious PDF — malware analysis report

Static analysis result for SHA-256 d965aa1abde05e78…

MALICIOUS

PDF

55.5 KB Created: 2020-03-10 03:59:36 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: e55c2d57873ef703124fc30c41fc7979 SHA-1: 661fb72c31cfea386f26ab6e890fb174ad5d1fd1 SHA-256: d965aa1abde05e78431706ad21cc88a4d322e3c72b4dac58bb9a6eb79035b383
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links to other PDF files hosted on various domains, a technique often used for SEO spam or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious. The embedded links suggest a content-luring or redirection strategy, potentially leading users to phishing sites or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://wcd-jtdgd98u.mgh-r.ch/uploads/1/3/0/4/130477455/130477455.html#cartesian+and+polar+coordinates+difference PDF link annotation
    • http://swimforyourlife.org/uploads/1/3/0/5/130588346/6775025.pdfIn PDF document text
    • http://cowle.de/uploads/1/3/0/6/130620337/sosejilezavasiwebuna.pdfIn PDF document text
    • http://mail.evanstacythrelfall.com/uploads/1/3/0/7/130740089/kereli_jasutula_libate.pdfIn PDF document text
    • http://cathysongyoga.com/uploads/1/3/0/5/130538869/wupit_podutovanoto_pobasejepur_pirosowoxofarap.pdfIn PDF document text
    • http://fetesetevenementsspeciaux.com/uploads/1/3/0/4/130488399/tavasegenoxebaj.pdfIn PDF document text
    • http://prismnpo.org/uploads/1/3/0/7/130775436/a07a9.pdfIn PDF document text
    • http://bayleymichaud.com/uploads/1/3/0/5/130545698/a7c733e6dadf5.pdfIn PDF document text
    • http://number120designs.com/uploads/1/3/0/6/130621022/8744dd79ea.pdfIn PDF document text
    • http://bibamate.com/uploads/1/3/0/6/130620475/vaweruzuripineniguwo.pdfIn PDF document text
    • http://www.ciaobellawilliamstown.com/uploads/1/3/0/6/130604520/3f148c19.pdfIn PDF document text
    • http://michelewestlaken.com/uploads/1/3/0/6/130621959/c2f992425baaf0.pdfIn PDF document text
    • http://michelevevang.com/uploads/1/3/0/3/130313480/bolisi.pdfIn PDF document text
    • http://www.pantherfightteam.com/uploads/1/3/0/6/130620921/vojilemef.pdfIn PDF document text
    • http://nordicwarriortraining.com/uploads/1/3/0/5/130543685/raweka_tiregefotu_tufega_gajupa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A71 9736 bytes
SHA-256: 6bf6500de623f7f7bc92ec4bbd14b74cce5636eba367d8228d9c1231a8fe5fa1
font_01_sfnt_off0000af23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF23 3432 bytes
SHA-256: 6444857d212d59486fd2460beb5c880fa69f0bd6d5b47f81c4ff3eb2e0ed9607
font_02_sfnt_off0000bb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3C 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

Open this report in the interactive analyzer, or submit your own file for analysis.