Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee09f9f7762b0d77…

MALICIOUS

PDF

82.6 KB Created: 2021-04-05 15:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 249e79c0aeee0d0eb58dcece34c7f8df SHA-1: 62e4ffd4b6563ab893e228625c09e62a69bd8325 SHA-256: ee09f9f7762b0d7783e1e8f672fe351c435a74b0a78aeafb4dbdd7b0ce8b7240
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with a critical heuristic identifying it as part of a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of embedded URLs suggests an attempt to redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/award?keyword=anestesia+loco+regional+pdf PDF link annotation
    • http://tiktoktop.design/bekosobofulomizepatilesb95pj.pdfIn PDF document text
    • http://salea.site/bowers_wilkins_805_d3eyf2w.pdfIn PDF document text
    • https://kelogukagikuval.weebly.com/uploads/1/3/0/7/130739039/ginosotab_gusasoz.pdfIn PDF document text
    • http://gatorama.space/20502392659eag8x.pdfIn PDF document text
    • https://vowevabejera.weebly.com/uploads/1/3/0/7/130775986/kaxibet.pdfIn PDF document text
    • https://vasaxufunibax.weebly.com/uploads/1/3/1/6/131606743/6a3692f7683.pdfIn PDF document text
    • http://mylevel.store/wokalivalemosavipiwilgse56.pdfIn PDF document text
    • http://future-techno.ru/handi_quilter_pro_stitcherxvq9q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417525/normal_605bc86653a96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530457/normal_6052f3de86b91.pdfIn PDF document text
    • http://bubble1.space/encase_certified_examiner_study_guidewho7d.pdfIn PDF document text
    • http://metalllift.ru/neha_kakkar_songs_new_downloadbkvh3.pdfIn PDF document text
    • https://gisijenoxumo.weebly.com/uploads/1/3/1/4/131437849/5262099.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wewiro/ahir_whatsapp_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/princeton_review_diagnostic_test_mcat_reddit.pdfIn PDF document text
    • http://weparaxopulo.atwebpages.com/54630120607.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/lofenirawetu.pdfIn PDF document text
    • http://lajovaputap.myartsonline.com/fewina.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/werudekalopetidapamawedi.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/saderikubolefezalamokefu.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://scripts.sil.org/OFLIn 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_off0000ecf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF2 5312 bytes
SHA-256: 7494be43346b1c9c1f2a80787a20fb3bd1efef0c955117a470a239ed6a73a1d8
font_01_sfnt_off0000ff11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF11 11920 bytes
SHA-256: 3596b1f6f0dbb31affa1690d2001d8ad134a6a468076d9ef054bc6c4ad0f6380
font_02_sfnt_off00012621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12621 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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