Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a46884965337bf…

MALICIOUS

PDF

42.0 KB Created: 2020-03-30 13:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: be931169e3e5eceacbc47efd17d060aa SHA-1: 46347afb4b2497dba92a39d6caa2e986fdc43d81 SHA-256: a7a46884965337bfd42104c697c603f4493109bcef73fb5f377a267b97efc5a9
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF documents on different domains. The ML classifier also strongly indicated maliciousness. This suggests the document is part of a link farm designed to manipulate search engine results or distribute further malicious content, rather than a direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://nursingarmpillow.com/uploads/1/3/0/6/130639683/130639683.html#un+texto+literario+de+escribir
    • http://onetravelbird.com/uploads/1/3/0/6/130604517/9aec402a2.pdf
    • http://beleeflaos.be/uploads/1/3/0/7/130776015/fareruzisajirumov.pdf
    • http://lkochdesignsolutions.com/uploads/1/3/0/4/130476496/batikesilog.pdf
    • http://qacoach.eu/uploads/1/3/0/5/130590373/xobixid_kuridubozotan.pdf
    • http://mudancareal.org/uploads/1/3/0/6/130620689/2947770.pdf
    • http://adoptablefamily.com/uploads/1/3/0/2/130271102/vodikagituxixonod.pdf
    • http://chinesephoenixarts.com/uploads/1/3/0/6/130639541/4952437.pdf
    • http://xenoslawfirm.com/uploads/1/3/0/2/130289385/9976885.pdf
    • http://berneseireland.com/uploads/1/3/0/8/130814172/01f0daba.pdf
    • http://pfedf.com/uploads/1/3/0/6/130620847/gasopajaj_togizetogofekex_rofuwagab_dejetowid.pdf
    • http://mrsindler.com/uploads/1/3/0/5/130588151/tajamifi.pdf
    • http://mountainmovercoaching.com/uploads/1/3/0/2/130289653/lezawazisajafapum.pdf
    • http://reallyagoodgirl.site/uploads/1/3/0/6/130620356/ledezil.pdf
    • http://pawpackz.com/uploads/1/3/0/6/130621980/70ddc903e140.pdf
    • http://coastalzephyr.com/uploads/1/3/0/7/130739285/varujefugasasinek.pdf
    • http://flfleetcollision.com/uploads/1/3/0/9/130969555/luvaxome.pdf
    • http://asdholistic.com/uploads/1/3/0/6/130639624/326789.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_off00007c3b.bin
ec4401a3c4bdbf3b61f67ad5a5143c656268e5ffd344282c03a8ac886845dc6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3B 8344 bytes

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