Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca0f9c4e25f8a8b8…

MALICIOUS

PDF

77.7 KB Created: 2021-02-25 10:40:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 544e413655b89a5059200443eabb5877 SHA-1: 6fad42e8d15835401035a5f0104a55e7d6ca90c4 SHA-256: ca0f9c4e25f8a8b82476e206e9d537ed962661959e5171353ec8cf74bc4699d6
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a PDF link farm heuristic. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs point to potentially malicious domains, suggesting the document is designed to redirect users to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/123?utm_term=code+of+points+gymnastics+2019 PDF link annotation
    • https://sibewelile.weebly.com/uploads/1/3/0/8/130815008/74ad50bf6.pdfIn PDF document text
    • https://pagejenaxupiwig.weebly.com/uploads/1/3/4/3/134383440/muzetopomub-mikor.pdfIn PDF document text
    • http://maykistore.ru/topic_sentence_worksheet_with_answersjws37.pdfIn PDF document text
    • http://vclean-sale.shop/lord_shiva_hd_images_free4psqh.pdfIn PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/zijox_paxoweselimi_vivizisarunu.pdfIn PDF document text
    • http://qunit.space/1152773720mmrph.pdfIn PDF document text
    • http://karaulovlife.site/vaaste_full_hd_video_song_free4q3af.pdfIn PDF document text
    • https://xatuzagu.weebly.com/uploads/1/3/0/7/130738971/3777593.pdfIn PDF document text
    • https://wotuvinuvokotar.weebly.com/uploads/1/3/5/3/135330473/puwasumesiko_pudogijediso_difugijo_tewunepujomi.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/takebemanijewok/772354103.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/biduledabu.pdfIn PDF document text
    • http://bexalawisilinot.epizy.com/capital_expenditure_sample_format.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/54333228442.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/fodetibekite.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/2008_jeep_wrangler_unlimited_x_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/mathematics_book_grade_12.pdfIn PDF document text
    • http://fizenigapajawak.epizy.com/24463624238.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_off0000f1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C9 5836 bytes
SHA-256: feaeeae92ec11099de68e279fbb9d2df3ef47cdaebbddcbc2efaa8ffa5326a97
font_01_sfnt_off000105a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A3 10500 bytes
SHA-256: aa552f467adc6dace7761e6776ec60674d72e095d1e56d9c4530b8768daef110

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