Malicious PDF — malware analysis report

Static analysis result for SHA-256 02cc7c2eb2fe1d78…

MALICIOUS

PDF

83.3 KB Created: 2021-03-31 09:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 64ca495113baabb6b80371efb15078cc SHA-1: 1c44c91dd34a317d2057680979829f17c3e6f193 SHA-256: 02cc7c2eb2fe1d787a81aecad6d190a7779195fc9c339e3fb6187060a8de59fa
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/award?keyword=amelie+nothomb+libros+pdf PDF link annotation
    • http://fipizilemuwob.medianewsonline.com/brochure_layout_template.pdfIn PDF document text
    • https://gokipojunarofaj.weebly.com/uploads/1/3/4/6/134635425/sifudujezi_gipewol_jigaguve_rukibaluwexu.pdfIn PDF document text
    • http://viwesisikumebi.getenjoyment.net/48743322216.pdfIn PDF document text
    • http://kewotij.mypressonline.com/sociologija_vladimir_vuletic.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/ihQhcgi/dolumabimafuditeni.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/why_is_h2so4_a_stronger_acid_than_h2co3.pdfIn PDF document text
    • https://cdn.sqhk.co/mumeriretepi/QiieHhh/home_assistant_integrations_github.pdfIn PDF document text
    • https://rejasujewefem.weebly.com/uploads/1/3/0/7/130738882/jovifotuvadowe.pdfIn PDF document text
    • https://xowanejizaki.weebly.com/uploads/1/3/1/8/131871556/c9647aff.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/ghghjFI/android_10_note_9_t_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/matapolid/hijgdjb/botorokepasojosogebugeri.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/sezebepit/81392986336.pdfIn PDF document text
    • http://gakilasefit.myartsonline.com/aristotle_nicomachean_ethics_book_2_chapter_1.pdfIn PDF document text
    • http://fadugenogow.epizy.com/benefits_of_english_language_learning.pdfIn PDF document text
    • http://natireda.epizy.com/varayti_at_varyasyon_ng_wika.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/fajefotu.pdfIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/calculus_1_limits_problems_and_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/30570416258.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/34238227161.pdfIn PDF document text
    • http://jotudokizer.onlinewebshop.net/academic_essay_topics.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/mobogenie_android_2._3_apk.pdfIn PDF document text
    • http://puloxivomavari.epizy.com/fractions_worksheets_grade_3_with_answers.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_off00010352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10352 5200 bytes
SHA-256: 7930a9419ab887e919d3e78f2c30af592f0708a77e9e08da7c9e834726289e9b
font_01_sfnt_off000114ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CE 13376 bytes
SHA-256: 76b5e996adb345ee5b9c9438570916a8ddd678e24a0b7d6b4a0f7fe8ed52fba6

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