Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cdf7addb56ba2f1…

MALICIOUS

PDF

46.2 KB Created: 2020-03-27 09:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 4a0e38937df6d787c176a8ecc8e24489 SHA-1: eff9d1b09ffd000acbe0f2e107502be4eaee34d6 SHA-256: 4cdf7addb56ba2f134f7064ce987a259d64fffa7daf6d6fd2172fd7e21b4d6b1
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, identified by the PDF_SEO_LINK_FARM heuristic. The document body text, while partially corrupted, includes a URL that is also present in the list of extracted URLs. This suggests the primary function of the document is to redirect users to a network of potentially malicious websites, possibly for SEO spam or to host further attack stages.

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://lykkenkommerindefra.dk/uploads/1/3/1/1/131164130/131164130.html#cambiar+de+fraccion+a+decimal+ejemplos PDF link annotation
    • http://californiaradoncoalition.org/uploads/1/3/0/6/130621995/1f593861480.pdfIn PDF document text
    • http://josephvecchione.com/uploads/1/3/0/9/130969363/1212107.pdfIn PDF document text
    • http://iteropartnerlab.com/uploads/1/3/0/7/130775217/jefeb-loxiwewunilowos-getagij-zirarisolenane.pdfIn PDF document text
    • http://famcamper.nl/uploads/1/3/0/8/130874143/6374610.pdfIn PDF document text
    • http://jminvestmentplanning.com/uploads/1/3/1/0/131070327/zawusujawametujasa.pdfIn PDF document text
    • http://saesweets.com/uploads/1/3/0/6/130639734/tobejajodizazeseri.pdfIn PDF document text
    • http://waythroughthewildernesshandwovens.com/uploads/1/3/0/7/130739658/kijuputawekopadozeke.pdfIn PDF document text
    • http://www.mrshkwkh.co.uk/uploads/1/3/0/7/130775593/jenuxawatugenu.pdfIn PDF document text
    • http://www.nakomahomesandland.com/uploads/1/3/0/6/130621521/towekiguler-jukomiratid.pdfIn PDF document text
    • http://101travelphotos.com/uploads/1/3/0/5/130588700/wodarawexaxewaz.pdfIn PDF document text
    • http://autumncalica.net/uploads/1/3/0/5/130550722/zevujedeseri_bazulew_sizemigoxijesu_femawanoxerevew.pdfIn PDF document text
    • http://swfloridaframingservices.com/uploads/1/3/0/8/130814731/lokeke-jadozukub-naxodekulige.pdfIn PDF document text
    • http://www.cityparkphotography.com/uploads/1/3/0/4/130436367/rusewetemosaxabumafi.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000692f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x692F 9276 bytes
SHA-256: cc9156834f08cb0b1da6813beb76af120a48e78290d265354cdedae55b713ef4
font_01_sfnt_off00008ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE2 2652 bytes
SHA-256: e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea
font_02_sfnt_off0000944b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x944B 16064 bytes
SHA-256: fb0748da6da2a1f7232feb297295a3ed328ee898c567929ff1fa5cd99482ed5a

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