Malicious PDF — malware analysis report

Static analysis result for SHA-256 51533c6b393c9043…

MALICIOUS

PDF

40.2 KB Created: 2020-03-07 23:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: 66ea730dd6f86de81b09335a21f23a9b SHA-1: f357f697a08ea0c7364664d441ac0757476a0adc SHA-256: 51533c6b393c904302ba4996fb32e72d46f5718d841689d730a218e5b094b4c5
96 Risk Score

Malware Insights

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

The PDF file 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 numerous domains, suggesting a link farm or SEO spam campaign. The document body contains garbled text but also includes some of the URLs, reinforcing the link-distribution purpose. No scripts were extracted from this sample.

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://webmail.ladse.org/uploads/1/3/0/5/130550926/130550926.html#definition+pan+africanism PDF link annotation
    • http://windrosecontabil.com/uploads/1/3/0/4/130477048/sekudajoledawe.pdfIn PDF document text
    • http://teamjaime.com/uploads/1/3/0/7/130739330/vomirimelane.pdfIn PDF document text
    • http://thedigitaltheologian.com/uploads/1/3/0/5/130544625/jafalodamajaf-fofabemupirewik-ronezo-fuvazuwarolar.pdfIn PDF document text
    • http://4peggy.com/uploads/1/3/0/7/130740414/fd36a7.pdfIn PDF document text
    • http://concretecuttingloganut.com/uploads/1/3/0/6/130621068/wusexejofe_lamumowalarome_xijukitosotas_gobara.pdfIn PDF document text
    • http://teenhardsex.porncolection.com/uploads/1/3/0/6/130639121/9540671.pdfIn PDF document text
    • http://onlinestoredifrancesco.shop/uploads/1/3/0/6/130622023/682583.pdfIn PDF document text
    • http://www.dongoad.com/uploads/1/3/0/9/130969304/314d51.pdfIn PDF document text
    • http://ninjasrs.com/uploads/1/3/0/5/130541662/116e9a320f60b.pdfIn PDF document text
    • http://myforeclosurelawyer.net/uploads/1/3/0/4/130435590/luniluloriged.pdfIn PDF document text
    • http://chasinbeauty.com/uploads/1/3/0/6/130620957/d0e5b2a274.pdfIn PDF document text
    • http://doddjohnson.com/uploads/1/3/0/2/130291699/7313459.pdfIn PDF document text
    • http://precisionfashioninstruments.com/uploads/1/3/0/6/130620731/2056106.pdfIn PDF document text
    • http://sapphireeast.com/uploads/1/3/0/2/130270931/8639054.pdfIn PDF document text
    • http://xoglamaccess.com/uploads/1/3/0/4/130436093/jaxemerik_borijexejov_lutedewol.pdfIn PDF document text
    • http://highdesertpaints.net/uploads/1/3/0/2/130289652/2921599.pdfIn PDF document text
    • http://henleywalker.com/uploads/1/3/0/6/130639357/4b777.pdfIn PDF document text
    • http://reikihealing.studio/uploads/1/3/0/7/130775267/tumotufexefole_vekajaji_zokopogu_baninusugu.pdfIn PDF document text
    • http://661junkhauling.com/uploads/1/3/0/2/130271167/9072025.pdfIn PDF document text
    • http://autodiscover.partytimeofcourse.com/uploads/1/3/0/7/130738837/6b38483.pdfIn PDF document text
    • http://newhomestelevision.com/uploads/1/3/0/7/130775529/wegefumal-bewilexekibovif-xugitibome.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7453 7956 bytes
SHA-256: e44314d98b5d3d8e98fde979974ac3961d1a65978070ee58966ae02fa859576c

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