Malicious PDF — malware analysis report

Static analysis result for SHA-256 12737534475aaca0…

MALICIOUS

PDF

75.6 KB Created: 2021-02-13 14:58:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 645e5f2e280dc9b66be3d62630060bb8 SHA-1: 9cad33cee46d18ff241f38de5c540c57ff2c0a61 SHA-256: 12737534475aaca0f876079ef926a6733310f703d490097f9c39cf1e8c4ee471
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/123?utm_term=vizio+m50-c1+service+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410002/normal_5fdbb841ac4d5.pdfIn PDF document text
    • http://richmaya.site/peminowi08rc.pdfIn PDF document text
    • http://vashmaster.info/enzyme_catalyzed_reactionvxfz0.pdfIn PDF document text
    • http://adv-workshop.site/fenozurowrnjch.pdfIn PDF document text
    • http://vudujupuboneg.22web.org/pennywise_laugh_ringtone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450883/normal_600d4e78236bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388165/normal_5ffa0810435d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370074/normal_5fe06946de9a3.pdfIn PDF document text
    • http://fafaviga.iblogger.org/jotanaxibixum.pdfIn PDF document text
    • http://karnaval.host/funezibigaziwinewiweol25g.pdfIn PDF document text
    • http://gufelujoziwuki.iblogger.org/dialog_animation_android_github.pdfIn PDF document text
    • http://sudedelanefozuk.66ghz.com/equations_of_lines_and_planes_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xutarefes.epizy.com/61039970516.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/manor_school_abingdon_uniform.pdfIn PDF document text
    • http://kazivaf.epizy.com/serivug.pdfIn PDF document text
    • http://zilapiwet.epizy.com/video_alfy_saga_penghianatan_cinta_darimu.pdfIn PDF document text
    • http://kazigolukujo.epizy.com/xaraxodiwewamezu.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/depegogizatezed.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/kariz.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/watobesariniwijezululubi.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/wetin.pdfIn PDF document text
    • http://dorediludopa.epizy.com/bavubod.pdfIn PDF document text
    • http://jufosuliz.epizy.com/alcoholism_treatment_guidelines.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_off0000e979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE979 5372 bytes
SHA-256: a89886aab010a6473bef68c0d2e3a4080fbd08f6253eefa375b0d933661aca1d
font_01_sfnt_off0000fbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCA 10876 bytes
SHA-256: 07fe62144c32249ec65633fdb70850107dce1f9c05a521e215b4e773e8d085d7

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