Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0346608033e50b0…

MALICIOUS

PDF

65.0 KB Created: 2020-03-27 02:27:59 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 8cfdc9b79bae0cc869e8510ca6c79f6f SHA-1: fd635b90bb20a8b4f2880642764fde5dabec5d56 SHA-256: c0346608033e50b04ffa16bae5fc392bd7193f092e969bbd5364d50f2f705f90
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or a distribution mechanism for further malicious content. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery or execution methods. The primary attack pattern observed is the redirection of users to a multitude of external resources.

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://afaparents.org/uploads/1/3/0/4/130436028/130436028.html#actividades+ludicas+para+ense%C3%B1ar+las+tablas+de+multiplicar PDF link annotation
    • http://equusmedical.com/uploads/1/3/0/7/130775831/lulelunarekenuzo.pdfIn PDF document text
    • http://basilandwoodie.com/uploads/1/3/0/7/130739082/xonojefozeginal.pdfIn PDF document text
    • http://webdisk.collegedemsatiu.com/uploads/1/3/0/3/130313649/jafexu_kivalajofugoka_kawuniguxi_wotikapu.pdfIn PDF document text
    • http://loto-milliard.site/uploads/1/3/0/7/130740563/nizoxisiz_didawa_pinodunuki_wobekepaxale.pdfIn PDF document text
    • http://charlidrawz.com/uploads/1/3/0/7/130740202/2d045afacc1b.pdfIn PDF document text
    • http://back-under-construction.com/uploads/1/3/0/4/130476122/levedaxodiwomas.pdfIn PDF document text
    • http://www.korysavage.com/uploads/1/3/0/7/130776312/lomogedagufopisi.pdfIn PDF document text
    • http://moerbenyulecheng.br3h.com/uploads/1/3/0/9/130969926/c090a7bcc.pdfIn PDF document text
    • http://www.foreverdreamfree.net/uploads/1/3/0/6/130604720/2131892.pdfIn PDF document text
    • http://chirpsofftheoldblock.com/uploads/1/3/0/7/130776617/juregepinefison-vewegelevipe-fedobubine-wutavalezitu.pdfIn PDF document text
    • http://coloradosroofingspecialist.com/uploads/1/3/0/7/130775352/b61c25169.pdfIn PDF document text
    • http://finaleagency.com/uploads/1/3/0/3/130323633/299155.pdfIn PDF document text
    • http://www.math-moves.net/uploads/1/3/0/6/130621890/0f0af9193051.pdfIn PDF document text
    • http://craftyladycrushingcancer.com/uploads/1/3/0/7/130775854/gibapoxejizaj.pdfIn PDF document text
    • http://natethehitmaker.com/uploads/1/3/0/5/130540472/xesurezibo_ginum_farow.pdfIn PDF document text
    • http://www.hauntedscottsdaleghosttours.com/uploads/1/3/0/9/130969266/wapofunexijudak_taxiwomageje.pdfIn PDF document text
    • http://nwm3.club/uploads/1/3/0/7/130776312/719a0b996b93f39.pdfIn PDF document text
    • http://wineandwhiskey.net/uploads/1/3/0/2/130289782/3065821.pdfIn PDF document text
    • http://www.sisterhoodofbadassery.com/uploads/1/3/0/6/130604502/bokidodoxaxaxu_wilekafotute.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 8

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_off0000b98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB98A 9808 bytes
SHA-256: 062559250ba1e6a2409b364d573fcb8cf68feaf09e15d5f5fb5c20d5f5315273
font_01_sfnt_off0000dc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9E 16340 bytes
SHA-256: 451895f61762ee2c92071758aadde1050fcd1a41f8262062c25ecb60f5c137f5

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