Malicious PDF — malware analysis report

Static analysis result for SHA-256 305ec90a4ddfcfe0…

MALICIOUS

PDF

37.1 KB Created: 2020-06-20 09:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 022632ff12c81a6b12cbd61fd0e866be SHA-1: fdbb656a8e993e7bb3cba117cca3885cc74583ac SHA-256: 305ec90a4ddfcfe0165f5813bdf957051ff8fc17e9fc6c2a82f93503eaa93c60
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, many of which point to PDFs hosted on various domains, suggesting a link farm or redirection strategy. The document body mentions 'Ontario boat license study guide' and includes URLs that appear to be part of this lure, likely directing users to malicious content or phishing pages.

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://cyberliabilitypro.com/uploads/1/3/0/8/130814245/130814245.html#ontario+boat+license+study+guide PDF link annotation
    • http://shut-the-front-door-properties.com/uploads/1/3/0/4/130477152/kutudisivikuleze.pdfIn PDF document text
    • http://goelcommunity.com/uploads/1/3/0/6/130621715/gumotezi_gabir_felegom.pdfIn PDF document text
    • http://webdisk.wilesbolt.com/uploads/1/3/0/2/130289625/448089.pdfIn PDF document text
    • http://swanksrock.com/uploads/1/3/0/3/130379841/59d6e78d49.pdfIn PDF document text
    • http://oldaleandsons.org/uploads/1/3/1/3/131384113/4011499.pdfIn PDF document text
    • http://drroddysuos.com/uploads/1/3/0/7/130775651/xiwiwigi.pdfIn PDF document text
    • http://purrfectgoldenpuppies.com/uploads/1/3/0/2/130289474/sojikajigipumizik.pdfIn PDF document text
    • http://mail.teachenglishstepbystep.com/uploads/1/3/1/6/131637797/besizod.pdfIn PDF document text
    • http://webmail.vulcantri.com/uploads/1/3/1/6/131636814/velitixu.pdfIn PDF document text
    • http://1em.undesirable.us/uploads/1/3/1/4/131437348/ba400ce0.pdfIn PDF document text
    • http://cpanel.monticellosmarket.com/uploads/1/3/2/7/132741430/lefofuzisubinufexaje.pdfIn PDF document text
    • http://artbycoleta.nl/uploads/1/2/9/3/129357681/129357681.html?canonIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F39 5260 bytes
SHA-256: 69527174c5ac9a6b33c42fce7c8a3fac9880ac8c24deaf110eb5d64ec6fefc86
font_01_sfnt_off0000611a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611A 11500 bytes
SHA-256: 67efff686a9ff7cf75624814e48b531a4448fb6925b7592369b488f5e2fd0070