Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa02ac89ce46e998…

MALICIOUS

PDF

76.0 KB Created: 2021-03-21 11:08:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 88f64ac7786364adbf7eaad95598410e SHA-1: 635456f0a35ad04f11e04c8c0ce1ea7ebbf7939b SHA-256: aa02ac89ce46e9989894842ba613b60bf6902a1ad8d069b4def359e3e63a18d7
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains keywords related to spiritual meaning and technical application names, possibly as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/wix?keyword=ringing+in+right+ear+only+spiritual+meaning PDF link annotation
    • http://characduwe.space/brother_hl_l2360dw_wifi_setupku0gl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_6052203ebc6cf.pdfIn PDF document text
    • http://uplrezina.site/63866201886tklaa.pdfIn PDF document text
    • http://hihikane.space/954659545948q9pk.pdfIn PDF document text
    • http://xekaleduwam.iblogger.org/73819914171.pdfIn PDF document text
    • http://lupaper.22web.org/jelibowo.pdfIn PDF document text
    • http://sozerujodurepef.22web.org/dipakom.pdfIn PDF document text
    • http://newsportstechnology.ru/lepamonotusoe3jiq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_60126bc56a3e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wajifinome.epizy.com/12324031295.pdfIn PDF document text
    • https://ad646471-8556-449a-8150-55a6f6ff724f.filesusr.com/ugd/7a1c5b_29457820750548239b378154004079bd.pdf?index=trueIn PDF document text
    • http://sitirij.rf.gd/popezaduv.pdfIn PDF document text
    • http://fabevurubojob.epizy.com/lazabejunotimevarubotok.pdfIn PDF document text
    • http://vivimaga.epizy.com/blossoms_of_the_savannah_novel.pdfIn PDF document text
    • http://dadiwewoweziwi.epizy.com/what_is_tragedy_in_literature_with_examples.pdfIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_6867a692429f4a5d97491ee72913dad8.pdf?index=trueIn PDF document text
    • https://66f9c2bc-82a6-463d-9ccd-9c94d3d8805e.filesusr.com/ugd/b361c6_cb16888846bf4575befbe5cfeafa2656.pdf?index=trueIn PDF document text
    • https://8ed6bd9f-de2b-4923-b7df-82f95eb18a03.filesusr.com/ugd/7fa32f_1845c44ff3584249a471dc9a5816e3e9.pdf?index=trueIn PDF document text
    • http://relumewamamit.rf.gd/how_to_reset_a_whirlpool_microwave.pdfIn PDF document text
    • http://dumevurofif.rf.gd/sobopuk.pdfIn PDF document text
    • http://jezirateba.rf.gd/pictograph_worksheets_for_grade_3.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_off0000ebdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDF 5340 bytes
SHA-256: 5b21b640b13323b4cc4f03e779d835fbbb3e5a8106fd387aa244f6be5a9df661
font_01_sfnt_off0000fdf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF6 10800 bytes
SHA-256: 97470bc9cf0509c574ef1dec487891173bdec0499d921cd0efa0bd5de7d1839f

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