Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef79687d41a94de…

MALICIOUS

PDF

44.3 KB Created: 2020-03-24 16:18:58 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 8e9a4c8ed8190b2bb3e9010d06d7c596 SHA-1: efa44bc15d113a3fb167ab09515553e469c76f21 SHA-256: 3ef79687d41a94de68c02e967683f56bdfcc051dfa41962112514aa200478c3d
96 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The embedded document body text, though partially corrupted, includes a URL that is also present in the list of extracted URLs. This suggests the primary function of this PDF is to act as a gateway to a large number of other websites, likely for malicious SEO or to distribute further payloads.

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://casabeartisan.com/uploads/1/3/0/5/130550672/130550672.html#que+significa+solidificar PDF link annotation
    • http://greencardxpert.com/uploads/1/3/0/7/130740351/zexiji_nasatobedep_tomoxifov.pdfIn PDF document text
    • http://bake-room.com/uploads/1/3/0/4/130483993/9573741.pdfIn PDF document text
    • http://osrsgpnow.com/uploads/1/3/0/7/130739385/besimevesol.pdfIn PDF document text
    • http://forteacademyofmusic.com/uploads/1/3/0/2/130288383/xamodolasezitegivav.pdfIn PDF document text
    • http://jessicasemporium.com/uploads/1/3/0/7/130739829/tetolelutagaxatesex.pdfIn PDF document text
    • http://bucksnortnrunclayworks.com/uploads/1/3/0/3/130313359/godemazezowi_nulafonajesa_retow.pdfIn PDF document text
    • http://cdn-7.visualpatterns.org/uploads/1/3/0/7/130776562/2458143.pdfIn PDF document text
    • http://millsacthelp.com/uploads/1/3/0/7/130740456/kukenixu-ropesudetuwex-xazovene.pdfIn PDF document text
    • http://federaltriallitigators.com/uploads/1/3/0/7/130738603/9458939.pdfIn PDF document text
    • http://mcdfoodconnections.com/uploads/1/3/0/7/130738722/rubuvurerekobikomu.pdfIn PDF document text
    • http://heyitstaay.ca/uploads/1/3/0/7/130776291/6053647.pdfIn PDF document text
    • http://whistletags.com/uploads/1/3/0/5/130588644/daladelaginolakejere.pdfIn PDF document text
    • http://www.coverageclue.com/uploads/1/3/0/5/130551450/9026c26f9c63.pdfIn PDF document text
    • http://www.paulgelb.com/uploads/1/3/0/3/130323381/faxumezixa.pdfIn PDF document text
    • http://pda.ezgsa.com/uploads/1/3/0/5/130541574/57a5dff5e.pdfIn PDF document text
    • http://jacksonlimo.org/uploads/1/3/0/6/130621219/sugumab.pdfIn PDF document text
    • http://mail.khasy.com/uploads/1/3/0/4/130476432/9008a9d9.pdfIn PDF document text
    • http://mathwithdominique.com/uploads/1/3/0/5/130539059/dilibepoveb_gabisato_rebedegut.pdfIn PDF document text
    • http://markroselab.org/uploads/1/3/0/6/130621646/segowe.pdfIn PDF document text
    • http://cultureexcellence.co.nz/uploads/1/3/0/4/130476120/sizam.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://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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAE 8724 bytes
SHA-256: 1100ffda0f437630f01d1e06d532903bd2fa0cab7079853777a3d249b5cb9d24
font_01_sfnt_off00008f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F83 16096 bytes
SHA-256: ff8fb627f3d0dd9997bbf5f8e67d75ba984810f76280c6dead7bf9ae512bf231

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