Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a17a009b01c146e…

MALICIOUS

PDF

58.5 KB Created: 2020-03-26 13:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e29f970d32c7fbd77ad594aa7b329a9e SHA-1: b632d7dc654ef63197f084ab5967bf19a6d361f8 SHA-256: 9a17a009b01c146e8bbe3210710308102b8675b1a5d04ad67480dd53336160a6
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body text is largely unreadable, but the presence of numerous URLs points to a link farm or redirection attack. No scripts were extracted from this sample.

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://patternmindset.com/uploads/1/3/0/6/130640172/130640172.html#que+es+plano+en+matematicas
    • http://www.jtbeidencharles.com/uploads/1/3/0/5/130588425/186614.pdf
    • http://polished-passion.com/uploads/1/3/0/3/130312996/59b9a6a4a.pdf
    • http://www.trippyfxtemplates.com/uploads/1/3/0/4/130488704/42f1032052c654.pdf
    • http://www.southcobbcastle.com/uploads/1/3/0/4/130488506/wegakusebagozi.pdf
    • http://casinoqueentheband.com/uploads/1/3/0/6/130604226/93e05d767be3c02.pdf
    • http://allisoncastle.com/uploads/1/3/0/7/130739107/07fe67b4254cc.pdf
    • http://mta-sts.dc-9703e2fc3781.swfarm.net/uploads/1/3/0/7/130740146/dotep_murimulalax_rijolilatulibo_radapanaw.pdf
    • http://rufflesandrustboutique.com/uploads/1/3/0/6/130620490/mesakew.pdf
    • http://aats.rocks/uploads/1/3/0/5/130551176/5059284.pdf
    • http://mollybernard.com/uploads/1/3/0/4/130476229/mofasapuwan_motuzup_xitexidibinak_basefawupide.pdf
    • http://elmadinaabaya.com/uploads/1/3/0/3/130313090/mijebuti.pdf
    • http://kiddomore.com/uploads/1/3/0/3/130313316/vatuzoneb_fixumivov_sirojolurijuni.pdf
    • http://casa20jd.com/uploads/1/3/0/5/130550983/saseja.pdf
    • http://lightjab.net/uploads/1/3/0/8/130813648/fc792c58.pdf
    • http://bluemountainresources.net/uploads/1/3/0/6/130604521/78e9de4b07.pdf
    • http://nirvanastorage.net/uploads/1/3/0/3/130379528/2441065.pdf
    • http://drodphotography.net/uploads/1/3/1/1/131164252/4f9f61ff.pdf
    • http://afriwendythread.com/uploads/1/3/0/4/130476141/7182322.pdf
    • http://www.renehindsarts.com/uploads/1/3/1/1/131164383/4666801.pdf
    • http://www.marcoantoniopatrizio.com/uploads/1/3/0/4/130476513/fe3f54.pdf
    • http://squirreldogwalking.com/uploads/1/3/0/5/130551551/gamakupokoxu.pdf
    • http://swainsborojaycees.org/uploads/1/3/0/5/130543648/699317.pdf
    • http://newfol.com/uploads/1/3/0/7/130739206/b92e11c6925646e.pdf
    • http://endeavorpetroleum.com/uploads/1/3/0/7/130775032/xiwopelulasiji.pdf
    • http://www.treatsrgood.com/uploads/1/3/0/6/130639059/6356644.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000abf3.bin
e81bd40f010fe9e378c436664e8ef229b174fda327cf676ce2d73ab027c8137e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABF3 10032 bytes
font_01_sfnt_off0000cfa8.bin
6dc6e07f93ae70488a19e8a398a1c6cda2f5723fc3d3cbe180c5afbb10c3611e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA8 2864 bytes

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