Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b77fbc82012e370…

MALICIOUS

PDF

47.1 KB Created: 2020-03-27 10:02:41 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 265e5be92e8cd538754f62a4856e19d3 SHA-1: 9881569c6169bb9bd2a00533ee7c8387034ad705 SHA-256: 1b77fbc82012e370fd20c67ef1c3d54d14f374b0528191f680fc9b156d713207
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body also contains embedded URLs pointing to various domains. This suggests a tactic to manipulate search engine results or to distribute further malicious content via these linked PDFs. No scripts were extracted, limiting the analysis of direct payload execution.

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://mymissblue.com/uploads/1/3/0/3/130379408/130379408.html#tipos+de+determinantes+y+ejemplos
    • http://naturaloasissalon.com/uploads/1/3/0/6/130604841/6875175.pdf
    • http://www.materialeslaroca.com/uploads/1/3/0/6/130604488/xizamu.pdf
    • http://www.aconcaguaextreme.com/uploads/1/3/0/3/130379466/8a1c1c.pdf
    • http://coastal-kb.com/uploads/1/3/0/5/130588954/sipomekuniduxa-zapajozimuw.pdf
    • http://www.charliecookmountaineers.com/uploads/1/3/0/7/130739174/2881981.pdf
    • http://oldfieldfarmhorseandhome.com/uploads/1/3/1/0/131070378/21a587c.pdf
    • http://nvintl.com/uploads/1/3/0/6/130604292/39e3d0efdff45e.pdf
    • http://www.pinkgirlart.com/uploads/1/3/0/7/130775842/1920560.pdf
    • http://ensolife.com.au/uploads/1/3/0/6/130604517/8278330.pdf
    • http://esslermontana.com/uploads/1/3/0/6/130604823/e0b63ec6.pdf
    • http://kidflick.com/uploads/1/3/0/6/130620705/aa0af1.pdf
    • http://wwww.jhamrick.com/uploads/1/3/0/2/130271224/nuwuxilugo.pdf
    • http://www.endodonticassociatesbc.com/uploads/1/3/0/3/130379597/voditoxulut-pupat-sunaz.pdf
    • http://www.loganfairfaxlaw.com/uploads/1/3/0/4/130476462/noruxubikokixi.pdf
    • http://www.mywavee.com/uploads/1/3/0/7/130739164/4015187.pdf
    • http://mabuto.net/uploads/1/3/0/8/130814192/6032778.pdf
    • http://vpn.mmsoundandlighting.com/uploads/1/3/0/7/130776273/toxutubovelonil-kanaxoni-duwuvowuba-rivesema.pdf
    • http://drsharonsterne.com/uploads/1/3/0/2/130270783/cee02.pdf
    • http://peibiker.com/uploads/1/3/0/6/130620635/xubuzejinewoxuk-tamizovezire-jujomogijo.pdf
    • http://belikethefrench.com/uploads/1/3/0/5/130589345/fac84556d0.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_off00008d9f.bin
c7af7ab3c137db65691e26afcddaeb12319badb9354a7959ed06cc4acab6e264		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9F 8668 bytes

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