Malicious PDF — malware analysis report

Static analysis result for SHA-256 51775108b6c35fa2…

MALICIOUS

PDF

33.1 KB Created: 2020-05-15 21:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 66ecea4068030b65c5a8018e2243523b SHA-1: 01179f0e2e6225abcbc97ff8317dade14f578498 SHA-256: 51775108b6c35fa2b9e6889cdf51945094519605e8d3a177b650b468b62b10b5
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic PDF_SEO_LINK_FARM specifically identifies this pattern, indicating a likely attempt to distribute or mask malicious content across numerous domains. No scripts were extracted, and the document body is largely unreadable, but the sheer volume of outbound links is highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://myamazonuk.com/uploads/1/3/1/3/131384208/131384208.html#o+saki+saki+8d+audio+song PDF link annotation
    • http://waikatomorriscarclub.com/uploads/1/3/0/7/130740089/dc026defc07.pdfIn PDF document text
    • http://primadonnaprincess.com/uploads/1/3/0/5/130551564/panopilukagox.pdfIn PDF document text
    • http://wolfestreetbrewing.com/uploads/1/3/0/6/130621951/ce26efeb4fcd.pdfIn PDF document text
    • http://resonanceradio.co/uploads/1/3/1/1/131163960/7165559.pdfIn PDF document text
    • http://goodcamp.net/uploads/1/3/1/0/131069898/16f3924c0ec.pdfIn PDF document text
    • http://achsp.org/uploads/1/3/0/7/130775383/ripinuv.pdfIn PDF document text
    • http://madlcleaning.com/uploads/1/3/1/3/131398567/3076f0f.pdfIn PDF document text
    • http://firecracker4mile.org/uploads/1/3/0/5/130551230/a6ea27cf8.pdfIn PDF document text
    • http://skyryanska.com/uploads/1/3/0/7/130776061/8891127.pdfIn PDF document text
    • http://trentbeaver.net/uploads/1/3/0/2/130287937/8903650.pdfIn PDF document text
    • http://riyasnails.net/uploads/1/3/0/8/130873927/guvujepawizil-sotav.pdfIn PDF document text
    • http://thedaisyflower.com/uploads/1/3/0/6/130605399/fabitog_rugazomamap_suruginuv_pugafesiwugifud.pdfIn PDF document text
    • http://lilidesignstudio.com/uploads/1/3/0/6/130639558/nojusabipala.pdfIn PDF document text
    • http://soundsolutions.eu/uploads/1/3/0/6/130604026/winukukuj_juwuzimekivewu_tunogejamegixav.pdfIn PDF document text
    • http://the-narrow-path.net/uploads/1/3/0/6/130640032/7536482.pdfIn PDF document text
    • http://621investments.com/uploads/1/3/0/7/130739839/873453.pdfIn PDF document text
    • http://treeserviceliberty.com/uploads/1/3/0/8/130874136/xulotasipatakivos.pdfIn PDF document text
    • http://crossstitchmania.net/uploads/1/3/0/4/130483909/nedabudiwuxido.pdfIn PDF document text
    • http://toruscleanenergy.com/uploads/1/3/0/5/130588370/tenifugutaxijar.pdfIn PDF document text
    • http://animeslug.com/uploads/1/3/0/7/130738822/xivefegovufube-judipoxeg-nofawoleta.pdfIn PDF document text
    • http://sechindravallury.com/uploads/1/3/1/4/131412181/7181107.pdfIn PDF document text
    • http://inverassociates.com/uploads/1/3/0/9/130969414/3411739.pdfIn PDF document text
    • http://ahualoagoatdairy.com/uploads/1/3/0/6/130603913/poburotazixew_maxazidemu_sinorexebim.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

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_off00005566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5566 10236 bytes
SHA-256: b40d6381d4ce6ed081028bccfbc41e31040cbeccfa13c162ea53306ae81608a2

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