Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0885f8ab03cedf…

MALICIOUS

PDF

86.5 KB Created: 2021-09-08 15:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d27fb3b78de520b3b96e55d4d5f2875d SHA-1: 59b054815a44f4fd350f4403dbf7ae3ac0e6952a SHA-256: 0d0885f8ab03cedfb398916263ab5cc92fc5723e861921f826a35daf85e8ca32
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting, pointing to a potential phishing or malware distribution site. The PDF structure itself does not contain readable content, suggesting it's designed to exploit PDF viewers or redirect users.

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 http://grandwatergatehotel.com/upfile_hotel/files/pogosuf.pdf In PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/54359483017.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1613816c465265---94267067673.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/44982634798.pdfIn PDF document text
    • http://ruizhishengwu.com/uploadfiles/file/062249215408.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/mifiwutegakesofutipezipo.pdfIn PDF document text
    • https://magicdiscoradio.hu/userfiles/file/mutakumibosuleguxari.pdfIn PDF document text
    • http://taigesw.com/upload/files/68032050301.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/fusodukifag.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/zijekudowedodu.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/41786930460.pdfIn PDF document text
    • https://casaalu.com/luutru/files/mewileziw.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/pikubelunemafu.pdfIn PDF document text
    • http://underbutter.cz/download/foto/rerusogutoxov.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/bipefisebaxa.pdfIn PDF document text
    • https://equalland.com/uploads/File/68373816317.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///gufavo.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16136d22d79bb4---21852200102.pdfIn PDF document text
    • http://inkjetartandimage.com/Uploads/file/47514762537.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/74062880556.pdfIn PDF document text
    • http://www.valaisconsulting.ch/file/16226923693.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/kitasamisurusadubof.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/a42415e9b81311614228d841704e8d19/80219690503.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/lubituguxesipoweno.pdfIn PDF document text
    • http://baoveantam.info/upload/files/29172383144.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=combine+pdf+free+download+onlinePDF link annotation
    • 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_off0000eb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001031e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031E 18608 bytes
SHA-256: dcc26d804e78484d7ec2c850ffb5c24fb09ade15a623bf9b58aaeaba7b36ac20
font_02_sfnt_off000133fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133FD 10652 bytes
SHA-256: 5ad1d27ff258be9675df99c471a8d2756f23ffb4938fa41184a925bf9eda2932