Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e92724d79a8fb3…

MALICIOUS

PDF

42.2 KB Created: 2020-03-08 08:58:31 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: ac562889ae17d5b63f43c4f64c6ce931 SHA-1: 70cb55c71694ade4788058f9f702b868b7c93d8f SHA-256: 36e92724d79a8fb33a524221c63e5ee0437ee4487ea6fc67ebace8af58025194
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

This PDF file exhibits characteristics of a link farm, containing numerous external links to various domains. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating a high likelihood of malicious intent, such as directing users to phishing sites or malware download pages. The presence of multiple, seemingly unrelated URLs suggests an attempt to obscure the ultimate malicious destination or to maximize reach. No scripts were extracted from this sample, but the sheer volume of external links is a strong indicator of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Malware.Agent-9780162-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Malware.Agent-9780162-0
  • 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.
  • 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://host172.carmichaelnl.com/uploads/1/3/0/4/130476469/130476469.html#half+range+sine+series+of+xsinx PDF link annotation
    • http://emberunderground.com/uploads/1/3/0/5/130588567/potugu.pdfIn PDF document text
    • http://wag-works.com/uploads/1/3/0/5/130590310/4534155.pdfIn PDF document text
    • http://mpoweredparenting.org/uploads/1/3/0/8/130874101/4963142.pdfIn PDF document text
    • http://floridagungear.com/uploads/1/3/0/4/130435794/7879875.pdfIn PDF document text
    • http://primenailsandbeauty.com/uploads/1/3/0/8/130874457/xokera.pdfIn PDF document text
    • http://disruptivoboutiqueagency.com/uploads/1/3/0/9/130969065/gajilirugade.pdfIn PDF document text
    • http://www.omnisales.uk/uploads/1/3/0/4/130435947/8025958.pdfIn PDF document text
    • http://topoffus.com/uploads/1/3/0/4/130489081/gureleve.pdfIn PDF document text
    • http://websiteamonth.com/uploads/1/3/0/5/130539366/1149024.pdfIn PDF document text
    • http://www.ramseyfamilyfarm.com/uploads/1/3/0/3/130379492/sevijew-novomaxefi-fadigep-gefagamikozu.pdfIn PDF document text
    • http://cheatyblinders.com/uploads/1/3/0/3/130312916/wurizozo.pdfIn PDF document text
    • http://www.red-shed.co.uk/uploads/1/3/0/6/130620354/warasozafegokel-nafubonofomevon-wodibem.pdfIn PDF document text
    • http://bickfordtutoring.com/uploads/1/3/0/6/130604256/1843336.pdfIn PDF document text
    • http://moheal-moringa.com/uploads/1/3/0/7/130775495/mogilejilezupisepexe.pdfIn PDF document text
    • http://abrprojectsaustralia.com.au/uploads/1/3/0/6/130639275/4cfd29c8dac.pdfIn PDF document text
    • http://marcoantoniopatrizio.com/uploads/1/3/0/3/130323155/vunutitatobibop_dibedinidu_pikazafex.pdfIn PDF document text
    • http://mail.footpathwinery.com/uploads/1/3/0/4/130483737/japetimanixal-rekazeveji-luwutepitudoka-bewebixizujuxe.pdfIn PDF document text
    • http://mdl-scholing.nl/uploads/1/3/0/6/130639578/6527311.pdfIn PDF document text
    • http://www.teamtodun.com/uploads/1/3/0/4/130483394/falunipukan_lijuwifaniremuw_sowova_gixif.pdfIn PDF document text
    • http://www.pbldurhamyouth.org/uploads/1/3/0/7/130775368/6a066186fbd0.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 8

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_off00005efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFD 7132 bytes
SHA-256: 1a46238783417f87a941abf75c65a98740aba69f15ac446f93ecfc4cd491f307
font_01_sfnt_off00007b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B39 2788 bytes
SHA-256: 985cbd9ba5b629f1b749d04d852c0eecb5d8ad374186a1044a60da9476420dc6
font_02_sfnt_off00008507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8507 16148 bytes
SHA-256: 6bbae1b83b726c1915d774d6853efb3721770ad750df1adb0aa89681ca1572c3

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