Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffc191d38fb09f98…

MALICIOUS

PDF

39.8 KB Created: 2020-03-25 13:01:56 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0cfc08ce94a3ad16dbc24d6668225523 SHA-1: 45f1ba74e72f7bae234a1c0484f8ef7da90afcc2 SHA-256: ffc191d38fb09f985e6fc4a7773ae6ca7d5482e5fd94ad4254b8774c636840f8
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are dynamically generated and point to domains that appear to be part of a link farm. The document body references '2008 f250 egr dpf delete kit', suggesting a lure to trick users into clicking on these links. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of it being used for malicious purposes such as phishing or malware distribution.

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://agpmav.com/uploads/1/3/0/8/130873825/130873825.html#2008+f250+egr+dpf+delete+kit
    • http://99zhenrenyulechengxianshangduchang.f18.ebkf.org/uploads/1/3/0/5/130589199/dotopivamisifexawaga.pdf
    • http://winestockpa.com/uploads/1/3/0/6/130621918/7834583.pdf
    • http://mta-sts.everydayacresohio.com/uploads/1/3/0/5/130550882/bajasulereko.pdf
    • http://tom-buckland.com/uploads/1/3/0/3/130313198/wutojesu.pdf
    • http://domainr.blog/uploads/1/3/0/4/130476471/selimikiro_fesakogizikis_wifunodubofan_pogovawivizuvo.pdf
    • http://westernsuburbwindows.com/uploads/1/3/0/5/130590297/6220167.pdf
    • http://allabouteyebrowsllc.com/uploads/1/3/0/6/130620524/4928459.pdf
    • http://www.redwingkneedoctor.com/uploads/1/3/1/0/131070521/0d4ef7a5310.pdf
    • http://desiamericanmusic.com/uploads/1/3/0/5/130543364/fegetebug.pdf
    • http://nw7.me/uploads/1/3/0/5/130551687/wazugovokam.pdf
    • http://rivelazioniprivate.org/uploads/1/3/0/3/130323968/15ac04.pdf
    • http://nmq8j.bpmtc.com/uploads/1/3/0/6/130621205/nokowadafe.pdf
    • http://jessicabelle.com/uploads/1/3/0/6/130604168/tiluze_supataxixujeru.pdf
    • http://chaiyee.com/uploads/1/3/0/4/130483256/3fab8999.pdf
    • http://numb-skullz.com/uploads/1/3/0/7/130775228/2325469.pdf
    • http://artistsway.net/uploads/1/3/0/5/130539309/sisuxe.pdf
    • http://thesafestlie.com/uploads/1/3/0/5/130539255/piwalev-fedawopotujo-giwawezifo-foxatesaxemage.pdf
    • http://www.preciousprelude.net/uploads/1/3/0/5/130547116/462cfcaac89912.pdf
    • http://setreport.com/uploads/1/3/0/5/130551898/6109598.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_off00007255.bin
3aef1898dc1fdedc8f329b400593b79511ed645a894a7eef02d3889470177ee7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7255 7668 bytes

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