Malicious PDF — malware analysis report

Static analysis result for SHA-256 7db4943898487279…

MALICIOUS

PDF

41.5 KB Created: 2020-05-13 22:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 126861deb56b23888f60983e6040efa0 SHA-1: fbde347c8f75997366ddbf723fb82b91704a0f5d SHA-256: 7db49438984872797b91c1aef44f15965cd6e8678384fd3a51a3d9481a36d215
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF documents hosted on different domains. The ML classifier also flagged this PDF as malicious with high confidence. The primary function appears to be acting as a link farm, potentially for SEO manipulation or to distribute further malicious content through the linked PDFs.

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://blesswiththedress.org/uploads/1/3/0/9/130968906/130968906.html#android+app+development+pdf+2019
    • http://1800ilisten.com/uploads/1/3/0/6/130639100/bimilu-sadijef.pdf
    • http://garagedoorrepair-tustinca.com/uploads/1/3/0/4/130435684/durowabiku.pdf
    • http://whistleblowerfloridalawyer.com/uploads/1/3/1/4/131409474/budivanafisi-fivepasupetixaj.pdf
    • http://11061101.xyz/uploads/1/3/0/7/130775884/safeseped_zeregujudu_zinatoni_xatubesizitem.pdf
    • http://ecohealthcareaustralia.net/uploads/1/3/0/3/130379231/migazolebakali.pdf
    • http://geekytrivia.com/uploads/1/3/0/6/130621839/02f37be8803e8bc.pdf
    • http://kingdomlifestyleministry.com/uploads/1/3/0/6/130620893/gekibawa_nuxasefo_wemol.pdf
    • http://disneyinspirations.com/uploads/1/3/0/6/130620479/xavolupozisali.pdf
    • http://lmlong.org/uploads/1/3/0/6/130639081/0837cadf47.pdf
    • http://kbqbookkeeping.com/uploads/1/3/0/5/130590138/lireruripitisi.pdf
    • http://ibmseduc.com/uploads/1/3/1/4/131483069/gefenulopunopu.pdf
    • http://singyoursongyourway.com/uploads/1/3/0/4/130476525/5807158.pdf
    • http://geneticsmusic.org/uploads/1/3/0/5/130590391/5430019.pdf
    • http://maureengrealishdesigns.com/uploads/1/3/0/4/130483869/4401197.pdf
    • http://friedenwolf.com/uploads/1/3/0/6/130605196/f7e52e66c9f43.pdf
    • http://sulasdominicanhairsalon.com/uploads/1/3/0/2/130272282/e90afc3fadfe4.pdf
    • http://comfish.com.au/uploads/1/3/0/3/130313826/doxuvefalifu_kirivoxofav_mefobav.pdf
    • http://roxanechoux.com/uploads/1/3/1/4/131483418/ranoguvumorixa-birufadamokox-zebarovedip.pdf
    • http://smile4others.com/uploads/1/3/1/4/131452753/4728553.pdf
    • http://thekeyfashion.com/uploads/1/3/1/4/131412426/2974b49120b25b6.pdf
    • http://edbaswell.com/uploads/1/3/1/0/131071180/pakipoxut.pdf
    • http://walkstockfarm.com/uploads/1/3/0/2/130291596/1987697.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_off0000774e.bin
cea708ddf73466f1ad58440a047dba75670ef80224c9fc4fa0e1161e49eed93c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x774E 10072 bytes

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