Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c0428203df077c0…

MALICIOUS

PDF

62.2 KB Created: 2020-03-30 23:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cf90822dc196098890261d4b43aa53db SHA-1: ba6497d40e85397ddd6e6bd54e4295cf5db652a9 SHA-256: 9c0428203df077c0f767940bcd51325ecbded95919cc8354891e9ebc6ef431fa
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious PDF

The PDF contains a large number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, pointing to other PDF files hosted on various domains. The ML classifier also strongly indicated maliciousness. This suggests the PDF is part of a link farm designed to distribute malicious content or manipulate search engine results.

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://relationshipscoachonline.com/uploads/1/3/0/4/130435772/130435772.html#introduccion+a+la+historia+de+la+gastronomia+libro
    • http://baylandent.ca/uploads/1/3/0/6/130639471/7891886.pdf
    • http://calendarservicesma.com/uploads/1/3/0/5/130589064/kamidovozafad.pdf
    • http://theknitclub.net/uploads/1/3/0/2/130287310/fezanijet_midoze_lemitibuxu.pdf
    • http://exchangehousetravel.com/uploads/1/3/0/6/130604807/bemulevikugisitiv.pdf
    • http://phoenix-fire-rising.com/uploads/1/3/0/6/130603724/204e2b95.pdf
    • http://booksbyhaythem.com/uploads/1/3/1/0/131070566/fd1eb7edfbe57.pdf
    • http://ctcwireframe.com/uploads/1/3/0/7/130739294/6390484.pdf
    • http://utile-it.com/uploads/1/3/0/4/130483265/1458441.pdf
    • http://kineotransportgroup.com/uploads/1/3/0/3/130313561/kejonugagapogoputasa.pdf
    • http://resisterhoodjmst.com/uploads/1/3/0/3/130313378/wejow_vodekexezofar.pdf
    • http://regress.us/uploads/1/3/0/6/130639038/retevotomuwap.pdf
    • http://poketanque.com/uploads/1/3/0/4/130476322/jodunapumijokagagon.pdf
    • http://nurturetyme.org/uploads/1/3/1/3/131380347/dojebumiwix.pdf
    • http://nursingresourcesaz.com/uploads/1/3/0/3/130313702/tetologewelasufifo.pdf
    • http://sofienbergbilvask.net/uploads/1/3/0/4/130436089/e4baa.pdf
    • http://ritathompsonpilates.net/uploads/1/3/0/7/130739006/740894.pdf
    • http://mjtshirtquilts.com/uploads/1/3/0/6/130640072/jenazinutagas_rovopezoji_kidimi_ranefamugemi.pdf
    • http://sayitwithaparty.com/uploads/1/3/0/6/130620849/8197939.pdf
    • http://elitemineralsinc.com/uploads/1/3/0/8/130874049/ac7de.pdf
    • http://fromtheeditorsdeck.com/uploads/1/3/0/3/130379162/3976445.pdf
    • http://missiontofarm.net/uploads/1/3/0/2/130289523/9d06fab80f186.pdf
    • http://cbdirect.biz/uploads/1/3/0/5/130539107/1df1cb.pdf
    • http://sbaloanlosangeles.com/uploads/1/3/0/4/130483200/1ccd03f14250f.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_off0000c979.bin
314e302a4b2abbaff344204cf52893d92294594c7800ef0ccd110885d55370d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC979 8580 bytes

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