Malicious PDF — malware analysis report

Static analysis result for SHA-256 0140ea1f55de5372…

MALICIOUS

PDF

77.6 KB Created: 2021-02-12 21:56:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 53fa1b1f033b209ed33c586452fdcdf8 SHA-1: c96e1372c9e653df2d596e317435fd472cd3f781 SHA-256: 0140ea1f55de53724752c640793c53fccb026a70efd894ef291b897947a2def7
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. An external URI pointing to 'baarspo.ru' was extracted, which is highly suspicious. Although no scripts were explicitly extracted, the PDF format and the presence of embedded URLs suggest an attempt to redirect the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wix?keyword=romeo+and+juliet+figurative+language+quiz PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470405/normal_602302374fe13.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/heS1tbq/the_battle_cats_pc_no_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bamazaludez/jeeDhcv/panasonic_video_camera_live_streaming.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384460/normal_5fdc1680eca43.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/50Eg2Oo/14886276108.pdfIn PDF document text
    • https://cdn.sqhk.co/tevenijubuso/YV3gGja/33951189197.pdfIn PDF document text
    • https://cdn.sqhk.co/kedezoge/jighdja/ruves.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/fejcgg5/58905205152.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487647/normal_5ff77b98476d7.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/ijzjbTK/mofapokesexusurajunatajuk.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/dGzgeLr/naval_movies_on_netflix.pdfIn PDF document text
    • https://cdn.sqhk.co/dunafafaxen/ajjbhaE/41287996809.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/gogunabones/virtue_theory_in_business_ethics.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/sotufonipatakawuworola.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/gorebok.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/present_perfect_tense_worksheet_with_answers_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/buzakixedizepibiwabipulo.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/soruwuvopavenofi.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/android_adapter_listview_not_updating.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/portfolio_website_template_bootstrap_free.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_off0000f3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AC 5368 bytes
SHA-256: 545a9653602a990fc1661dbe63e7d2e2c6500e49dea101669df77bf7dbb62a8f
font_01_sfnt_off000105eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EB 10316 bytes
SHA-256: 631842aa0a7e460c32f94a49d99613ee8123a57daf1a4376c7429a2db2f5b4fe

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