Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e44f22e925655bc…

MALICIOUS

PDF

35.5 KB Created: 2020-03-14 11:53:34 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8f00529ca421f125626381e5e81c3fff SHA-1: d0af8d78342fff4788ff25326c4779584164fc2f SHA-256: 0e44f22e925655bc9742107ab5e6d3c473665284123ec1d7f372b711548ad832
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains a URL that is also present in the list of embedded links, suggesting a coordinated effort to direct users to potentially malicious websites.

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://yinghuangwangshangyule.br3h.com/uploads/1/3/0/6/130622027/130622027.html#george+michael+careless+whisper+piano+sheet+music
    • http://whatscookingthemomblog.com/uploads/1/3/0/3/130380002/fupirimofinumi-nokubusasurem-bawudodafefix.pdf
    • http://tolandvideo.com/uploads/1/3/0/6/130603858/vudafomop-zajixo-puninuren.pdf
    • http://skyleslawfirm.com/uploads/1/3/0/4/130491699/bamatana.pdf
    • http://communityfarma.es/uploads/1/3/0/5/130539843/taburaga_lugesevivolipol.pdf
    • http://allbigskyrealestate.com/uploads/1/3/0/5/130551011/xomunuzuwu_nafuxizi_wobatab_sidivosa.pdf
    • http://stylebyalexandra.com/uploads/1/3/0/6/130621677/1353446.pdf
    • http://www.infinitemuses.com/uploads/1/3/0/2/130289623/mozaji.pdf
    • http://ameliavstanley.com/uploads/1/3/0/6/130605338/vidojaremajow-nexefagakepe-zipewala-zupif.pdf
    • http://www.amberaasman.ca/uploads/1/3/0/6/130639406/wofuf_sakamunol.pdf
    • http://scwaterfrontworks.com/uploads/1/3/0/7/130739020/zesifarikiw.pdf
    • http://narayanahotelandresidences.com/uploads/1/3/0/6/130622076/zinikenoxifizoperu.pdf
    • http://divineimagetj.com/uploads/1/3/0/4/130435746/8262538.pdf
    • http://princetonfamilywellness.com/uploads/1/3/0/5/130540823/7795401.pdf
    • http://icepickproductions-uk.com/uploads/1/3/0/9/130969284/f2ed003213.pdf
    • http://bluezone2030.com/uploads/1/3/0/4/130488197/govukabutugavor.pdf
    • http://www.bandtcaliforniazion.com/uploads/1/3/0/8/130874031/444f6c7ba3188e.pdf
    • http://dr-ballouz.eu/uploads/1/3/0/7/130739333/zevovib.pdf
    • http://orthogistic.com/uploads/1/3/0/5/130551245/fusuwiri-vasol.pdf
    • http://911bailbondsla.com/uploads/1/3/0/5/130588282/355203.pdf
    • http://geogypsies.com/uploads/1/3/0/6/130604836/854255943017a.pdf
    • http://blushingmushrooms.com/uploads/1/3/0/7/130738830/tasukugeg.pdf
    • http://vanmarkitonmusic.com/uploads/1/3/0/2/130272482/a2a046e74be700.pdf
    • http://www.scclovessmithfield.com/uploads/1/3/0/2/130289541/7861105.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_off000061d3.bin
7dadbbc2ecc2075cf9718440e8811364c5c2cd287c6e5198e33cf0af1d700036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D3 7720 bytes

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