Malicious PDF — malware analysis report

Static analysis result for SHA-256 9666d5f4c55cadc3…

MALICIOUS

PDF

82.1 KB Created: 2021-03-18 14:28:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0858c6080fc6b693f3f6cf8a8f3fa4d7 SHA-1: e7ec4656c16278bbffcc560a2386a9db2b6231ec SHA-256: 9666d5f4c55cadc3a2e7713c228147ca7891f3e2d8876ccddeae4ac15790fff9
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to a search query, suggesting a social engineering tactic to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=does+dell+active+pen+work+with+ipad PDF link annotation
    • https://pazaduzot.weebly.com/uploads/1/3/4/4/134473777/6166938.pdfIn PDF document text
    • http://2022god.com/16991237033c5mi6.pdfIn PDF document text
    • http://mizifasurogik.mywebcommunity.org/61501316805.pdfIn PDF document text
    • http://5coupon.info/garmin_nuvi_50_lifetime_updatesztabd.pdfIn PDF document text
    • http://tafakiduwav.scienceontheweb.net/free_download_novel_anything_for_you_mam.pdfIn PDF document text
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/sakumajekoju.pdfIn PDF document text
    • https://nexajatolotol.weebly.com/uploads/1/3/4/3/134308242/19e84.pdfIn PDF document text
    • https://torudedo.weebly.com/uploads/1/3/4/3/134352944/nipuzifazabab-guvipagajuxege-guridigib.pdfIn PDF document text
    • http://prostosite.site/12996033364fkbcb.pdfIn PDF document text
    • https://setunifajufin.weebly.com/uploads/1/3/5/9/135989633/3662136.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/microsoft_office_2013_free_download_for_windows_10_64_bit_with_key.pdfIn PDF document text
    • http://wekanisa.scienceontheweb.net/american_literature_journal_submissions.pdfIn PDF document text
    • http://gutagige.sportsontheweb.net/coroners_and_justice_act_2020.pdfIn PDF document text
    • http://onlinekartiadesi.com/70398759165awu0e.pdfIn PDF document text
    • http://rcasino.info/what_are_the_roles_and_responsibilities_of_a_software_tester3r3g0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lavavil.rf.gd/fuvefebirizarafep.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/48218206537.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/fesataladiwivuwekuvumi.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/waporonibamekelovojafa.pdfIn PDF document text
    • http://xotaxebotejij.rf.gd/56095260342.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/baermann_funnel_method_of_nematode_isolation.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/91414577238.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED23 5376 bytes
SHA-256: 2c73353b6f413ef55ff3cede7440b1deae90bf03aad784c84817c930a4d8064a
font_01_sfnt_off0000ff83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF83 10720 bytes
SHA-256: 739e453a08e38d4c26396ae96b6b5aae706b8dce63a099cec474cc0819a42186
font_02_sfnt_off00012424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12424 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d

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