Malicious PDF — malware analysis report

Static analysis result for SHA-256 e51ff2aea171dbc0…

MALICIOUS

PDF

85.1 KB Created: 2021-03-07 08:27:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d34600fe25895968ce777573049bea23 SHA-1: 43c4bc7032aaa4f09eddeb7cd1eda37dec700cd0 SHA-256: e51ff2aea171dbc05761a7d1cfd6b12b8f221c39610a5105185a753b03cc7185
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that mimics a search query for a user guide, a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wix?keyword=surface+pro+3+user+guide+windows+10 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368235/normal_5ff9f2f813c35.pdfIn PDF document text
    • http://kalowodopole.mygamesonline.org/98876411662.pdfIn PDF document text
    • http://vituloza.sportsontheweb.net/sims_3_pets_free_download_mac_full_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405186/normal_5fe6fcf423302.pdfIn PDF document text
    • http://wutanumijejol.sportsontheweb.net/relulavekasod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489733/normal_5ff288f12f14a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474727/normal_6011603a60b7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418001/normal_6022dbd4642f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5fd18560b7fdb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wovisak/free_caller_id_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/bosch_appliance_installation_manuals.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/88276139653.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/borderlands_the_pre_sequel_athena_leveling_guide.pdfIn PDF document text
    • http://xonelamurojili.rf.gd/badapi.pdfIn PDF document text
    • http://kaxuwenewutexu.myartsonline.com/92629926141.pdfIn PDF document text
    • http://joluror.rf.gd/78404173308.pdfIn PDF document text
    • http://pujumek.myartsonline.com/30294451171.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/xixej.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/memento_mori_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/canadian_visa_application_form_for_minor.pdfIn PDF document text
    • http://jadupapobixe.epizy.com/sopidififujal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001018d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018D 5648 bytes
SHA-256: ef9d4ae85727b33bce7472caadab7a7957f997db2db77e32a66d79a84b370010
font_01_sfnt_off000114da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DA 10420 bytes
SHA-256: 14649abd41d16e59a2a6ac5257e791878832540e83205d47c7f1388da4ae0e18
font_02_sfnt_off00013877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13877 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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