Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e0b66265867345…

MALICIOUS

PDF

77.3 KB Created: 2021-09-19 19:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e30b6b2e6a23127b1d759676249ba6c3 SHA-1: 75245bfc04c11c8e27d4eb77c53c2f6e8ea1a631 SHA-256: f2e0b66265867345b21e5143a4d846c26ba83b5bebedb0d1523c3fd931f8b6f9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution campaign. The presence of external URIs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=sniper+3d+hack+online PDF link annotation
    • http://jagodkaprzedszkole.pl/userfiles/file/jaxuzenir.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/99629978459.pdfIn PDF document text
    • http://serbanindustrialconstruct.ro/uploads/files/94348614882.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/pututavadutemexafaregef.pdfIn PDF document text
    • https://cargobull.cz/res/file/60320593564.pdfIn PDF document text
    • http://2rent.gr/userfiles/file/pozutidipipapimupomumigev.pdfIn PDF document text
    • http://esangsok.com/upfile/files/pexosemosumijipisijen.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210902092016_1204764231.pdfIn PDF document text
    • http://zuszdounky.cz/files/96536901122.pdfIn PDF document text
    • http://mbeautyconcept.com/upload/content_images/file/66960722926.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/j86q18bbce9ie74emjnhquhr06/watesixagoperesutut.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/89160559851.pdfIn PDF document text
    • https://granitnet.hu/editor_up/zezodusexofemomut.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/20692514972.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/zakakufosunesorejizogaj.pdfIn PDF document text
    • http://benly-carson.com/product/files/sisir.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/161423331c1f2e---wadutevuwiruvowigidofosal.pdfIn PDF document text
    • http://karinameal.com/imgdish/files/xalaxunudutitopanujujetam.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/84842395387.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/70977328433.pdfIn PDF document text
    • https://menu2uplus.com/images/file/rekadafokuvuj.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-19/20210919072126521131.pdfIn PDF document text
    • https://futurefacesnyc.com/uploads/file/meminekanabajisuze.pdfIn PDF document text
    • http://gyogytornasz.hu/editor_up/56556491439.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_off0000cc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC93 16764 bytes
SHA-256: ef2aa8aba19a2ae80636b964c9c3e2b811783cba7260d791da6182a1cec47d65
font_01_sfnt_off0000f795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF795 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAC 10684 bytes
SHA-256: a44cef09fd5737017d461ea9caaed00c5a7e33abd40153a0b92e64145d41621d

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