Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac0e39940086bbf6…

MALICIOUS

PDF

40.5 KB Created: 2020-03-24 02:14:27 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f3a7ad008dd8d40087b40334ee55a0b3 SHA-1: c08332ba9fb0cf285d306ccbea889ac420437c24 SHA-256: ac0e39940086bbf67bc93468b0f3fd35f09aff11dbd25e1b99ce1ac7d594cc02
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains. This pattern is indicative of a link farm or SEO poisoning technique, designed to drive traffic to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that the embedded links are part of a malicious campaign.

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://sauerlandhypotheek.nl/uploads/1/3/0/4/130483244/130483244.html#que+es+elipsis+en+cine
    • http://michelledburks.com/uploads/1/3/0/2/130289205/51df2f0.pdf
    • http://quintazoe.com/uploads/1/3/0/8/130874496/6fe6cb0de7c5b.pdf
    • http://lashnlearnwithdanniee.com/uploads/1/3/0/8/130874125/7bfc97b9.pdf
    • http://spalmedia.com/uploads/1/3/0/3/130313179/9034068.pdf
    • http://encantos-sagrados.com/uploads/1/3/0/6/130640235/0db91a7c901.pdf
    • http://northeastohiodukes.com/uploads/1/3/0/5/130539728/7806353.pdf
    • http://analogi.us/uploads/1/3/0/4/130488694/loruwedata-dadowe.pdf
    • http://beijingshinryukan.com/uploads/1/3/0/2/130289288/8791262.pdf
    • http://musicspeaking.com/uploads/1/3/0/5/130588489/fomojalixuwose.pdf
    • http://positiefsamenwerken.com/uploads/1/3/0/5/130539584/7745608.pdf
    • http://fastmac.co.uk/uploads/1/3/0/7/130775570/fuwejumemuvupa_zizopuzejo.pdf
    • http://spilledbeanscoffee.com/uploads/1/3/0/6/130639073/3bc7d4a5178a6c.pdf
    • http://endpapermail.com/uploads/1/3/0/6/130605307/zaxijap.pdf
    • http://stutteringmedia.com/uploads/1/3/0/6/130620822/c07a5690e5de69c.pdf
    • http://voicemale.actor/uploads/1/3/0/5/130540420/bixobezuxefaweg.pdf
    • http://www.hydratingsheetmask.com/uploads/1/3/0/8/130873839/varagixufilib-ripanonoz.pdf
    • http://your-aroma.co.uk/uploads/1/3/0/6/130621330/a5ee8a82ed4.pdf
    • http://navajos.de/uploads/1/3/0/7/130740401/kakukofetawano-fazabopo-mokejulerumafo-pifobinuguvazu.pdf
    • http://theoatmealpan.com/uploads/1/3/0/2/130270776/wagusunakadalemut.pdf
    • http://www.immobilier-val-de-marne-94.fr/uploads/1/3/0/7/130776582/zagube.pdf
    • http://coredisplays.com/uploads/1/3/0/6/130620906/422607.pdf
    • http://whitestarcannabisfarm.com/uploads/1/3/0/7/130739508/pozufokamux-votamomuduril-palunenemipuj-solopapavugek.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000751b.bin
0fa14a7214120835d414d9be47dcf5222ac37298ee824c99d78b05698bf42fa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x751B 8164 bytes

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