Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee074fa6cc5c71b1…

MALICIOUS

PDF

83.2 KB Created: 2021-09-24 01:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1c28dc591b157f8209881a3b063d7f89 SHA-1: a13df05cc9ead8cd92ae54f5b561b1eb11c15375 SHA-256: ee074fa6cc5c71b106fa2c4ce5cd50fea569e76188de08f9abe2f0b34a20e1de
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://allytemp.ru/uplcv?utm_term=pou+unlimited+coins+apk PDF link annotation
    • http://pacemakerpressintl.com/uploads/assets/file/63296547667.pdfIn PDF document text
    • http://bugskin.org/userfiles/file/zixezakexomimig.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16134605ce1d86---bizifod.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/zurubivulofibejogedo.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/593e6a8f6460de9b6248bbea62226bf6/logileziziga.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/gekekonezijugutozoliweli.pdfIn PDF document text
    • https://studioconcept-stand.com/fck_userfiles/file/rarapiwikufegalufapi.pdfIn PDF document text
    • https://betsin.org/userfiles/files/96064461294.pdfIn PDF document text
    • https://samsungklima.net/upload/ckfinder/files/xiwutigamakido.pdfIn PDF document text
    • http://sithome.com/upfiles/file/20210905034835.pdfIn PDF document text
    • http://apicn.net/upload/files/zitupik.pdfIn PDF document text
    • https://verticala.ro/images/userfiles/jisowexowabitometugugufe.pdfIn PDF document text
    • http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/vawovubabasi.pdfIn PDF document text
    • https://biocenfis.es/uploads/assets/file/4214257273.pdfIn PDF document text
    • http://autolubitel-irk.ru/userfiles/file/86853650042.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/16521679214.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/fapalozazezabi.pdfIn PDF document text
    • http://mrukseo.pl/userfiles/file/gadagizami.pdfIn PDF document text
    • http://rowerowaszkola.pl/imgturysta/files/majuvominasub.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/12711222098.pdfIn PDF document text
    • http://mijinmotor.com/fckeditor/userfiles/file/72390894873.pdfIn PDF document text
    • http://sissonne.hu/editor_up/74692102757.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/52307416328.pdfIn PDF document text
    • http://genbreedpublisher.com/files/upfiles/file/16638728248.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0B 18232 bytes
SHA-256: 027d77163ecd2758d531c407bb730908d479f43d9e790b9dc3d481742ae847e0
font_01_sfnt_off00010dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12603 10768 bytes
SHA-256: dc941da3aa72730cb08d338479a982773fdebfc22731c2f69c944aad5ab7d608