Malicious PDF — malware analysis report

Static analysis result for SHA-256 a84c3149e6801f06…

MALICIOUS

PDF

75.1 KB Created: 2021-04-02 23:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1cc7f161764cf375e4445532e708817b SHA-1: e36e87988dd1f62e60d80b1d81f404ab458ef06b SHA-256: a84c3149e6801f06c6e8272dbf757772c91fd5c3ab51274067cb351152d82b08
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of external URIs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/123?utm_term=auto+transmission+vs+manual+transmission PDF link annotation
    • http://ludshop.xyz/ritipakovilonujakarpzsew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443619/normal_600c21b1cf1fa.pdfIn PDF document text
    • http://rozogididibusar.sportsontheweb.net/71371891226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443372/normal_6051b022ac200.pdfIn PDF document text
    • http://tk-pobeda.site/86622517830pcr9a.pdfIn PDF document text
    • http://fuzabura.sportsontheweb.net/business_management_course_material.pdfIn PDF document text
    • http://profaudit32.ru/what_if_my_license_expires_during_covid_in_nyck184.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/iaDjf0I/vesujikavutefaruv.pdfIn PDF document text
    • http://vukufitu.mywebcommunity.org/physical_and_chemical_properties_of_amines.pdfIn PDF document text
    • http://rasprodavaika.ru/la_jerarqua_de_valores_segn_max_schelerhzrsw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490754/normal_5ff5c72c8415b.pdfIn PDF document text
    • http://realwockyc.info/wow_legion_pc_specsvp7nv.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/glkiijh/37947139217.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384026/normal_5fed9622d823b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380082/normal_60139ebaea570.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/dazuxujepov/sesifiteturotenafol.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/camera_fv-_5_apk_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/how_to_get_error_codes_on_whirlpool_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/57348368629.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/16103004939.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/vunafelezi.pdfIn PDF document text
    • http://domuromu.atwebpages.com/91298014392.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/pediatric_volitional_questionnaire.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF0 4880 bytes
SHA-256: abefcbd839f1e8ab3b567a0471d43c94209b85e0c73826ef5b99bc5401053c0d
font_01_sfnt_off0000fb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB71 10412 bytes
SHA-256: faa98cfd4eb2607198149302179f2275c7f64ffe3acc5de478eba4ab4b5c79a0

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