Malicious PDF — malware analysis report

Static analysis result for SHA-256 752ff75698cfdea6…

MALICIOUS

PDF

72.5 KB Created: 2021-03-19 23:12:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d5593b4a421edc45b89b0a43c6122366 SHA-1: 6ef339dd4811ad984cca359bb27e374a896f3cf8 SHA-256: 752ff75698cfdea6bde3ba6fe573d38fd7e911ae71a32c40dab7a2528713633c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to 'Adventure of a lifetime electric guitar' and 'wkhtmltopdf', which may be part of a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jacksth.ru/123?utm_term=adventure+of+a+lifetime+electric+guitar PDF link annotation
    • http://woberate.getenjoyment.net/zurom.pdfIn PDF document text
    • http://gopusoduj.mygamesonline.org/is_there_a_navy_base_in_san_antonio_texas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_60545578a28d3.pdfIn PDF document text
    • http://tuwiximobibatud.iblogger.org/does_texas_have_cottage_food_laws.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_6049aad23b779.pdfIn PDF document text
    • http://dofukatejipoz.66ghz.com/mujik.pdfIn PDF document text
    • http://lnstagaram-verifiedbadges-from.com/74186801083vu7gx.pdfIn PDF document text
    • http://top-odejda.com/glencoe_algebra_2_standardized_test_practice_answersyy790.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403270/normal_5fdfa760a4c12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367313/normal_5ffd69af8d592.pdfIn PDF document text
    • http://idealicacolumbia.site/viwofovurapsirg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475989/normal_5fee681722dba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473052/normal_601fad459c939.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450635/normal_5fdf494a45b19.pdfIn PDF document text
    • http://bomepufibawil.scienceontheweb.net/best_buy_weekly_ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387807/normal_600094c41defb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_98c1bc78841243cfb39b2547158df8c0.pdf?index=trueIn PDF document text
    • https://4c5ad993-366d-4b3a-aa99-9b6f56583180.filesusr.com/ugd/01e791_3dff40819ca54079992b4832e10b167c.pdf?index=trueIn PDF document text
    • http://miwewugewu.atwebpages.com/85277443378.pdfIn PDF document text
    • http://wilukejukiroxu.epizy.com/58045684966.pdfIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_ab647cc4767145b8b1d0aee3a8f231c5.pdf?index=trueIn PDF document text
    • http://wugugobom.epizy.com/asma_ul_husna_with_meaning.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_off0000ddf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF5 5212 bytes
SHA-256: bd3ad3f8215c01fa98b122fb8d9e6f2046f37f7882f2b7ef221e7c217ec73a05
font_01_sfnt_off0000efa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA2 10804 bytes
SHA-256: 982f2958fcb837ef7896830cf9dccead501e8426cfc8f0c1df6c8ad619342f82

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