Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bece3051672a8e…

MALICIOUS

PDF

40.0 KB Created: 2020-03-29 14:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e11ccc1d5c8858f40d52601df0f4a352 SHA-1: f3a39aaeb7d87c35ea4815f3bc783edffed68912 SHA-256: 07bece3051672a8ea4b8435a947e4afb063937846745123d09aad5ac321ba71d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL points to an HTML file with a title related to polynomial functions, suggesting a lure. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent behind the link farm.

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://74-123-73-16.mgwnet.com/uploads/1/3/0/3/130379757/130379757.html#grados+de+las+funciones+polinomiales
    • http://jeremyhoover.com/uploads/1/3/0/4/130476514/2590121.pdf
    • http://portlandareainjury.com/uploads/1/3/0/6/130639350/sejutasinebu.pdf
    • http://electannmariejohnson.com/uploads/1/3/0/5/130550953/1dd3241.pdf
    • http://marilynmonroelegacy.com/uploads/1/3/0/8/130874030/kazela.pdf
    • http://pk-architects.com/uploads/1/3/0/5/130550722/kevanumodamopodu.pdf
    • http://darrylweber.com/uploads/1/3/0/5/130542935/xedivire.pdf
    • http://bloominlate.com/uploads/1/3/0/7/130776061/404905.pdf
    • http://tryinhere.info/uploads/1/3/0/3/130313783/xemuvodamag.pdf
    • http://pastimepastriesinparma.com/uploads/1/3/0/3/130379696/c15132a.pdf
    • http://ciomentor.net/uploads/1/3/0/7/130775015/wumovigatenukefavan.pdf
    • http://integrinscientific.com/uploads/1/3/0/6/130605122/jukunedif.pdf
    • http://sophienew.com/uploads/1/3/0/7/130738525/lezurukudu.pdf
    • http://modavalienteluxury.net/uploads/1/3/0/3/130323642/sejomekali_nabaraxoxululu_dozukemelaze.pdf
    • http://anrmachine.com/uploads/1/3/0/6/130604048/lidiba_vunavodusoxotef_vepinomujere_mimonafevanubix.pdf
    • http://enchantedonlineboutique.com/uploads/1/3/0/6/130604240/ditigut-zesonitejafed.pdf
    • http://cleanbooksinc.com/uploads/1/3/0/8/130814295/4894769.pdf
    • http://subacutelogisticscorp.net/uploads/1/3/0/7/130739048/pizexebedeze-zoxuwajawageviz-fonima-ribulolenup.pdf
    • http://adinacox.com/uploads/1/3/0/6/130603810/xewalifiz-risowupurako.pdf
    • http://precisionbusinessenhancement.com/uploads/1/3/0/7/130740113/1240284.pdf
    • http://khepe-ra.com/uploads/1/3/0/4/130435870/duwade.pdf
    • http://osterbind.info/uploads/1/3/0/6/130640139/ef575ac9874.pdf
    • http://creating-coaching-cultures.com/uploads/1/3/1/1/131163857/64068e139.pdf
    • http://bowjobs.net/uploads/1/3/0/4/130483670/1249306.pdf
    • http://smokencoffee.com/uploads/1/3/0/8/130814088/pajewa.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_off00007243.bin
9753919f66ae8dfae8dd792df4a34be884465e7d18956aa7274fcbc0c5d76e20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7243 8200 bytes

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