Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e4a8a1a1706e8c…

MALICIOUS

PDF

81.8 KB Created: 2021-09-20 00:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f74ac82fcaa48eeb10e6a478f45524a2 SHA-1: 75a7a8708bbd1a45396718f803da7ca2767a28b1 SHA-256: 12e4a8a1a1706e8c86c34def0fe5cef6452847fc6163094f79ce9d0e610859e9
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a high heuristic firing indicating it's a link farm on disposable hosting. The ML classifier also flagged the PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 4

  • 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://tiquital.com/documentos/file/tigukugetepadape.pdf In PDF document text
    • http://zaiger.ru/img/file/14431120509.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142efafedaaf---xerok.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/623261538.pdfIn PDF document text
    • http://suaups.net/userfiles/file/matabivijitujanij.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/valanidakoz.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/panajewewixumomenebal.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210908154634_1439924160.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/kijutamerukadugopubidiwus.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/lusugonubukurupetevu.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/54836400957.pdfIn PDF document text
    • https://franchisebusinessadvisors.franchisebrokerwebsites.com/broker-site/files/files/levifabufunavajidinitoxi.pdfIn PDF document text
    • http://mdknoodles.co/uploads/files/98658446824.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142716dd5b6d---somuzipexokutetil.pdfIn PDF document text
    • https://globalcareerclub.com/FCKeditor/userfiles/file/fesejugizigasow.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/29407193477.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/jalijowimozewu.pdfIn PDF document text
    • https://securitydm.eu/slicice/file/83912554438.pdfIn PDF document text
    • https://ribaczpeter.hu/files/file/42303362801.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/45146258401.pdfIn PDF document text
    • http://scpt.it/userfiles/files/jetutekutuvota.pdfIn PDF document text
    • https://rosettes.it/userfiles/file/wabiza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=ghd+sports+latest+appPDF 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_off0000dce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE9 17644 bytes
SHA-256: 962501bdb08b29b837918292d11111b7e8d052938e7cee69a998ab22ba60ec77
font_01_sfnt_off00010ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC4 10332 bytes
SHA-256: 908ea286dc4ec68baff703c8e1d0da1f65aa4a11865d1f3f7574730d6e69db19
font_02_sfnt_off0001223e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.