Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a2b5fc6143ca49e…

MALICIOUS

PDF

42.8 KB Created: 2020-03-27 05:42:31 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b3e31311465fbd75634c5b455c6da18b SHA-1: 7933207fd069612bdebb74dc07e94d5e07b7e5d6 SHA-256: 7a2b5fc6143ca49e5275732db7a20ca20576073885e034bebefebe342657782e
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, and the document body is heavily obfuscated, but the presence of numerous SEO-like links suggests a lure to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://quantpioneers.net/uploads/1/3/0/4/130490977/130490977.html#ejemplos+de+integrales+triples+resueltos
    • http://cleanforetagsstad.com/uploads/1/3/0/6/130621916/5681326.pdf
    • http://musiowskyed.com/uploads/1/3/0/7/130738576/wedegiluwiz.pdf
    • http://byhumano.com/uploads/1/3/0/4/130483418/musade-miboz-japokaw.pdf
    • http://www.ilanaleberdesignfolio.com/uploads/1/3/0/7/130776133/sokeluvu-jiwagumawezup.pdf
    • http://merakidestinationmanagement.com/uploads/1/3/0/7/130739105/pisiguwa.pdf
    • http://caciqueroyale.com/uploads/1/3/0/3/130323381/bukebitunujajela.pdf
    • http://crimsonshadowpack.com/uploads/1/3/0/7/130739383/9261288.pdf
    • http://ss4js.com/uploads/1/3/0/5/130543262/suromi_puxenonafulox.pdf
    • http://canadiansforglobalcare.com/uploads/1/3/0/8/130813756/jubix.pdf
    • http://eumid.com/uploads/1/3/0/2/130289577/cae5490b5e1bddb.pdf
    • http://twbmotors.com/uploads/1/3/0/7/130740184/taxadozem.pdf
    • http://leadingedgeacoustics.com/uploads/1/3/0/4/130476721/puzupar.pdf
    • http://endodash.com/uploads/1/3/0/9/130969003/89f977.pdf
    • http://binathebeanbag.com/uploads/1/3/0/7/130739830/lokutoxotoxexuxobaxa.pdf
    • http://belmarbookcon.com/uploads/1/3/0/6/130604027/4214907.pdf
    • http://www.fionaclairegoodwin.com/uploads/1/3/0/5/130539933/zamejigo.pdf
    • http://homerestaurantgroup.com/uploads/1/3/0/6/130622022/tegetusagevidetida.pdf
    • http://wellnesscorner.info/uploads/1/3/0/5/130589279/jiwenemixefinu.pdf
    • http://dgias.pl/uploads/1/3/0/6/130621854/puritikaso_tizekufomud_firuj_duremepotudopo.pdf
    • http://www.firstclassclean.com.au/uploads/1/3/0/5/130541188/dezusalepumasozu.pdf
    • http://www.speaknaturallyoftampabay.com/uploads/1/3/0/2/130287266/webare.pdf
    • http://www.mlle-yoni.com/uploads/1/3/0/7/130776403/88261aee44b6.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_off00007ba5.bin
d44d0e4d2aec3e912a9e8982f2e929f5e0ddadd558163d19a2bcef2c6706566f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA5 8840 bytes

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