Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c9ba7680533582…

MALICIOUS

PDF

38.0 KB Created: 2020-05-23 19:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a811399b570c30aee42474d6686e8da SHA-1: 2afe7ecd146415fd24e06c2f31e259707656aa03 SHA-256: 14c9ba76805335821c37330db4e463217552777153316da42142ca8cdc8f7a2b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly flagged this PDF as malicious. The primary purpose appears to be SEO manipulation or distributing a large volume of content via these links, potentially leading to further malicious activity.

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://uppercapedronemedia.com/uploads/1/3/1/3/131398195/131398195.html#les+conjonctions+suivies+du+subjonctif
    • http://merlorelationshipcoaching.com/uploads/1/3/0/4/130476853/af539.pdf
    • http://evergreenehikes.com/uploads/1/3/1/3/131397997/bukuverofur.pdf
    • http://denvergolfpartee.com/uploads/1/3/0/7/130775111/nukugubov_nabelozuvoxa.pdf
    • http://redibargains.com/uploads/1/3/1/6/131637178/jijapusedaj-tigeropik-subifex.pdf
    • http://pezularealty.com/uploads/1/3/0/7/130739917/gatopuxolitefi.pdf
    • http://joedunsford.com/uploads/1/3/1/0/131071286/goveju.pdf
    • http://refreelance.com/uploads/1/3/0/4/130435547/dipitizixunowu.pdf
    • http://sq1sys.com/uploads/1/3/0/6/130639173/ritobimogesatidopu.pdf
    • http://hostmaster.oecva.eu/uploads/1/3/1/0/131070806/gugobezufivobiv.pdf
    • http://nadco.net/uploads/1/3/0/6/130604222/380134.pdf
    • http://nicksrealestate.org/uploads/1/3/1/1/131163909/89eed3723.pdf
    • http://hf1barbershop.com/uploads/1/3/0/7/130776035/sizumetonudapus_nosabojuv.pdf
    • http://timandmelody.com/uploads/1/3/0/9/130968994/e3155.pdf
    • http://d2jmusic.com/uploads/1/3/0/3/130323568/2670608.pdf
    • http://gladbargains.com/uploads/1/3/0/8/130814293/ca1deb220.pdf
    • http://cypressluckymuttkennel.com/uploads/1/3/0/4/130477176/a3e1b389f09.pdf
    • http://memphiszombie5k.com/uploads/1/3/0/5/130551049/tavoxokijowuvawiset.pdf
    • http://kerriturnerpianostudio.com/uploads/1/3/0/6/130620309/6201058.pdf
    • http://oddboxgames.com/uploads/1/3/0/8/130874416/jigojobib.pdf
    • http://carowoods.co.uk/uploads/1/3/1/4/131483109/8c7cbda.pdf
    • http://truismmarketing.com/uploads/1/3/1/4/131438121/pegotetox_vukeraretebixan_wuwas.pdf
    • http://darisayrealestate.com/uploads/1/3/0/6/130640097/6783431.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006799.bin
08f962d81b4745f6510c436206e72754d262caa7d289ea989133441e4b3c3ab5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6799 11248 bytes

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