Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc17682229bccab…

MALICIOUS

PDF

47.3 KB Created: 2020-03-22 05:44:34 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-10
MD5: 8f9659d4156f6d1f631770ff1762015b SHA-1: 046e78e20780b415b795c842bc231ba3ba7a4854 SHA-256: 7bc17682229bccab21f3e29d5c6e7fd2d28294821d19c2b5ababe568f0e5f7f0
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm designed to manipulate search engine results or host malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the extensive linking suggests a phishing or SEO poisoning attack.

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://jotthemdown.com/uploads/1/3/0/5/130540714/130540714.html#moore+embriologia+pdf+online PDF link annotation
    • http://webmail.casadedios.us/uploads/1/3/0/5/130541351/jorumenudefat-zaletiledibel-voviz-desekojo.pdfIn PDF document text
    • http://cleanstreakco.com/uploads/1/3/0/9/130969330/8a2c453a340a85.pdfIn PDF document text
    • http://carolineleuzinger.com/uploads/1/3/0/2/130272979/16e19cc1085.pdfIn PDF document text
    • http://mobilespeechplus.com/uploads/1/3/0/6/130604036/wewajafevasasep-movexokogagasul.pdfIn PDF document text
    • http://laurenmichaels.net/uploads/1/3/0/6/130620877/vedoma.pdfIn PDF document text
    • http://www.toriroberts.com/uploads/1/3/0/6/130639683/c2e1a69a3d.pdfIn PDF document text
    • http://gowdywildwingsbirdfarm.com/uploads/1/3/0/8/130873995/zozixejojixozapolobi.pdfIn PDF document text
    • http://www.hcnnelsonjewelers.com/uploads/1/3/0/2/130273982/pejosunategonikif.pdfIn PDF document text
    • http://suck-pretty.com/uploads/1/3/0/5/130588410/4f11e7a13ddb1.pdfIn PDF document text
    • http://hairbyjoss.com/uploads/1/3/0/5/130551661/bapakuguga.pdfIn PDF document text
    • http://thomasjfinn.com/uploads/1/3/0/7/130739492/luzerob.pdfIn PDF document text
    • http://regentcrosses.com/uploads/1/3/0/6/130621044/03f6dde5b6.pdfIn PDF document text
    • http://mypsyblogonline.com/uploads/1/3/0/3/130379921/xefemimexem.pdfIn PDF document text
    • http://zenbazaar.shop/uploads/1/3/0/5/130588584/natifijoj_raronusuvowa_verepevon_doguterug.pdfIn PDF document text
    • http://greeneprojectcounseling.com/uploads/1/3/0/4/130483454/2393071.pdfIn PDF document text
    • http://happytailsveterinarycenter.preview.pethealthnetworkpro.com/uploads/1/3/0/7/130775075/zaxubidavobakugebip.pdfIn PDF document text
    • http://rasamny-ibrahim.com/uploads/1/3/0/7/130776575/78cb2db0586e.pdfIn PDF document text
    • http://mantorvillain.com/uploads/1/3/0/7/130776341/6242f9e55bdf1f.pdfIn PDF document text
    • http://thehealingsanctum.com/uploads/1/3/0/2/130272903/9940590.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

Related samples 1

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_off00007ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE1 10380 bytes
SHA-256: c5712720c3ae111d89213c63cb06ffa0de95242bbeab3dcef0afb9c63b170724
font_01_sfnt_off00009f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F4C 4192 bytes
SHA-256: 6f0b671495085bb2adddea747409d1c6707ac6e3d3fc1a779d3ecea1531eb415

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