Malicious PDF — malware analysis report

Static analysis result for SHA-256 4705e66ca4239973…

MALICIOUS

PDF

184.7 KB Created: 2021-04-18 04:50:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bff22bbfd4084c3a1a818cb5f699cc58 SHA-1: 49122488d045f2c12a85cf06e16ab5129ef196d3 SHA-256: 4705e66ca4239973e541d4ea68bcdaa134a1b0808df96c6c34834fbabc2a0c52
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous suspicious links to disposable domains, suggesting a phishing or malware distribution campaign. The heuristic 'SE_SECURITY_BYPASS' indicates the document may instruct users to disable security software, a common tactic in malicious documents. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest it's designed to exploit vulnerabilities or trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9459

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://soxebez.ru/strik?utm_term=danby+mini+fridge+with+freezer PDF link annotation
    • http://legiontry.online/email_attachment_zip_formatmx9jk.pdfIn PDF document text
    • http://about-igsupport.com/marigatotalezedsbz.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/ioHNmK2/27203514474.pdfIn PDF document text
    • http://opros.xyz/db2_sql_error_sqlcode-104_sqlstate42601_sqlerrmcaskrw8i.pdfIn PDF document text
    • http://loginwithfb.site/lincoln_ac_dc_225_stick_welderfmkgp.pdfIn PDF document text
    • http://andyhongdigital.com/zisurikaguphxvts.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/djahejd/wizard_of_oz_cast_2013.pdfIn PDF document text
    • https://cdn.sqhk.co/vomikigiw/Hgjhihj/xuposunukasajozuwabeperik.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/ygchiGG/92646619951.pdfIn PDF document text
    • https://cdn.sqhk.co/vemetafije/hgrmQhj/pulse_secure_login_problem.pdfIn PDF document text
    • http://hookup157.site/ccs_university_exam_form_2019_ballb0611b.pdfIn PDF document text
    • http://infonewsuk.site/transfert_thermique_cours_et_exercico7tx8.pdfIn PDF document text
    • https://cdn.sqhk.co/badisasi/jLSifRd/bubble_witch_saga_2_frobbles_levels.pdfIn PDF document text
    • http://jusuzabajalaz.22web.org/widazibotoxizorobat.pdfIn PDF document text
    • http://towajemikof.iblogger.org/41257932518.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/hiUhdie/gogizotirinekevofimate.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/geDFSig/29671897802.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sosagid.epizy.com/18912774852.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/20028074668.pdfIn PDF document text
    • http://dasubaweno.rf.gd/11761786300.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/python_the_complete_reference_by_martin_c_brown_download.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/Wi-Fi_Protected_SetIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26381 2828 bytes
SHA-256: 2f32373152b86590eb5c993bf8dbb57d20fc33770b92bc1ec6b5fd985d660553
font_01_sfnt_off00026d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26D7A 1768 bytes
SHA-256: 4fe1f96ba8db5cf35ca47cddaf067669eaebb9c038fc61eabfa1f5836d0fc525
font_02_sfnt_off00027620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27620 5172 bytes
SHA-256: c9e85117907d402411bf6c2f63652f956d34f97ec9e016bc4efaf1fd0ebff4d8
font_03_sfnt_off000287a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x287A1 11996 bytes
SHA-256: 5b01c7fd7541da7ca9fb8a3407993465eece9b0cdc397d37459772e0d8024bd9
font_04_sfnt_off0002b094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B094 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953
font_05_sfnt_off0002c52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C52E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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