Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1e0de94eba9f90…

MALICIOUS

PDF

83.2 KB Created: 2021-09-16 17:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cfab4d9efd62afd695814c452d711d41 SHA-1: d202eaad324059d1fa381d001bfef207374f2fb0 SHA-256: fa1e0de94eba9f90efc82902972d68c9272bbebf90f3658dce8dc92d1a6d446c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, suggesting a link farm or redirection mechanism. Heuristics indicate it's a link farm on disposable hosting and ClamAV detected it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an intent to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://wastran.ru/uplcv?utm_term=android+10+close+app PDF link annotation
    • https://idroilektriki.gr/files/file/kedudaf.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/77448318127.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/78470113179.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/kazuzofixanemevivimiregag.pdfIn PDF document text
    • https://dcimx.com/files/wakov.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a82fab9f9---vakuzu.pdfIn PDF document text
    • http://nzozkrowodrza.pl/uploads/editor/file/80789491425.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021091602534738.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/85463182719.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/jejax.pdfIn PDF document text
    • http://konyanincigkoftecisi.com/userfiles/file/xidozoxepanevep.pdfIn PDF document text
    • http://imaginove.eu/data/Files/niravoriju.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/lajegaxun.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/rovexofusozosakizo.pdfIn PDF document text
    • http://fermobkorea.com/userfiles/file/20210911143841.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/97903548294.pdfIn PDF document text
    • http://sevinctekstil.com/resimler/files/28972462614.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/balurigegizawebapu.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/5167479049.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/33167995392.pdfIn PDF document text
    • http://kunbot.com/upload/files/zebimu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161384827e9272---24457543118.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/68833059145.pdfIn PDF document text
    • http://ciba.lv/uploaded/file/84643323006.pdfIn PDF document text
    • http://hongphuc.vn/userfiles/file/vagapitamefanabimulidukob.pdfIn PDF document text
    • https://bevasilicones.in/userfiles/file/17099425478.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_off0000e190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE190 17448 bytes
SHA-256: 926839abc442e7332722b33b462890ea0785979feb03444c708652c0d984b8fe
font_01_sfnt_off00010eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEC 10564 bytes
SHA-256: 8abce6d926e936715b79dd6766146aa34b738c08fa14b165b0a30f4e3476ceb8
font_02_sfnt_off0001271e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1271E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1