Malicious PDF — malware analysis report

Static analysis result for SHA-256 28891c55b2d195b7…

MALICIOUS

PDF

50.5 KB Created: 2020-03-06 16:32:56 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 220012d01643bac7725ec066ca24744f SHA-1: 8fe49a36ad750c1bde78cc3c30e7be06116708e1 SHA-256: 28891c55b2d195b711a28d8f6ac518c651ddfb9244b2ede97221bcc8c09b22de
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm designed to lure users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://hudongwangluoqipaiyouxi.br3h.com/uploads/1/3/0/9/130969373/130969373.html#zeplin+download+assets
    • http://influxhub.co.uk/uploads/1/3/0/5/130590092/5042652.pdf
    • http://www.myremio.com/uploads/1/3/0/7/130776078/kiwosazesebesat-folimokivasimob.pdf
    • http://nsadmin.turkskebab.com/uploads/1/3/0/6/130604666/pabivepuj.pdf
    • http://farmwifelifend.com/uploads/1/3/0/3/130323465/savunesepo_jidenirotapof_tizej_zarobibuf.pdf
    • http://tlvantiques.com/uploads/1/3/0/3/130324170/pefawuwo_nuvogu_rujumopufu.pdf
    • http://youtubehow.com/uploads/1/3/0/6/130639664/393090.pdf
    • http://abogadosespecialistas.net/uploads/1/3/0/5/130551971/bezotibaremom_rasakovuwimifa_miruwek_bafomipakivuvo.pdf
    • http://kingdomdvlpr.com/uploads/1/3/0/7/130775016/tolomol.pdf
    • http://alicewild.shop/uploads/1/3/0/4/130489386/01c51f.pdf
    • http://modernparentingnetwork.com/uploads/1/3/0/4/130435998/xopafufalo_viwuzojenurad_jojut.pdf
    • http://www.mcleoddesignbuild.com/uploads/1/3/0/7/130776228/janodaxeviti-wibofovonuros.pdf
    • http://shavanoparktreeservice.com/uploads/1/3/0/4/130488322/2631682.pdf
    • http://dotcoder.com/uploads/1/3/0/6/130604162/jedilekepopugev.pdf
    • http://anonymousimage.org/uploads/1/3/0/2/130289493/gowodu-liwubupejokop-nadofovamin-bixit.pdf
    • http://milknstrawberry.com/uploads/1/3/0/5/130550868/buzojipavu.pdf
    • http://outdoorjava.com/uploads/1/3/0/7/130776326/e411e3e7.pdf
    • http://www.faithtrustandglitterdust.com/uploads/1/3/0/4/130475981/paruwatovojerineriwe.pdf
    • http://prolystings.com/uploads/1/3/0/6/130604366/6756184.pdf
    • http://somanyjaimes.com/uploads/1/3/0/7/130738975/9597768.pdf
    • http://www.classicallyshort.com/uploads/1/3/0/3/130313741/d56c85288309a1.pdf
    • http://monocacycreekhouseconcerts.com/uploads/1/3/0/7/130739906/8528968.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007623.bin
a81d944b81e8dd5c6c58acb5a4483b370f6ce7c76c1e3e3992922cff7f351e44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7623 9088 bytes
font_01_sfnt_off00009869.bin
6c8203cc433f3c43ff2dfa1252dfda58061aa43394712e2f2bef77a18bf374e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9869 2420 bytes
font_02_sfnt_off0000a32d.bin
550ad874351a7a7967da94933c4d950b8a5796f59b6e0582943060ff8007175a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA32D 16676 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.