Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e60bc8e7de24cd9…

MALICIOUS

PDF

99.4 KB Created: 2021-02-18 17:26:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9c7e7f3f5b668e70554abd07cfc800ad SHA-1: 8fd4752d92cd797753000c8100c5e38094627ef7 SHA-256: 2e60bc8e7de24cd9adc8293e2d46bbbe4b660026a1d4748e1ccda65d8ae98bfd
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains multiple embedded URLs, including one pointing to 'jottigo.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'Algebra 2 common core chapter 2 test answers', indicating a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wix?keyword=algebra+2+common+core+chapter+2+test+answers PDF link annotation
    • http://bet-info.ru/why_does_my_pioneer_radio_say_memory_full9kuea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486748/normal_5fc9f966c8510.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493905/normal_5ff40a2cecc46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_602d20e551875.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413118/normal_5ff760b85b20b.pdfIn PDF document text
    • http://tasimidu.iblogger.org/fortnite_challenges_cheat_sheet_week_2.pdfIn PDF document text
    • http://copyright-helps-team.com/mayflash_f500_elite_template6p2gh.pdfIn PDF document text
    • http://frasqen.online/free_printable_coloring_sheets_of_catsgrd7n.pdfIn PDF document text
    • http://jigabidom.22web.org/manualidades_navideas_en_fieltro_para_cocina.pdfIn PDF document text
    • http://kopolebukerone.iblogger.org/32083226662.pdfIn PDF document text
    • http://polnews.xyz/accession_number_apa_format9hoq6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://taxowojo.epizy.com/genekonadejaf.pdfIn PDF document text
    • http://resutujimi.epizy.com/best_hacking_software_for_pc_free.pdfIn PDF document text
    • http://bujoraz.rf.gd/forifuguwilafaf.pdfIn PDF document text
    • http://fufezexu.epizy.com/tuwodofezedimanudezojipo.pdfIn PDF document text
    • http://jagogapibibolin.epizy.com/nelifuvefawetemagigu.pdfIn PDF document text
    • http://vaxutusurinav.epizy.com/72038559640.pdfIn PDF document text
    • http://muvubavove.epizy.com/nakoluriduvu.pdfIn PDF document text
    • http://wuvadofer.epizy.com/froebel_house_ofsted_report.pdfIn PDF document text
    • http://doxinaxa.epizy.com/wazimimonusox.pdfIn PDF document text
    • http://gawebunopom.rf.gd/there_to_be_past_simple_exercises.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_off00013d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D1D 5700 bytes
SHA-256: 14a08c312e5bd844fbdbfff4a213bc7738cffd6144eb3edfc2701795c8c0c641
font_01_sfnt_off00015067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15067 15560 bytes
SHA-256: aa1bbf4f2c5ab65747f59077253b59c7dfe6858ef4a4a504449f7104f1cbd394

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