Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbfabe641a6ea8c7…

MALICIOUS

PDF

76.3 KB Created: 2021-03-03 07:21:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2135344805fab55abb349badc364cc1f SHA-1: 7af21052618908a4a2949881972d2353c8fae249 SHA-256: cbfabe641a6ea8c796ac4f1c0691bd5b6944d7d2c94b58ee277dc94b31dce9cb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are obfuscated or use generic filenames, indicating a link farm designed to direct users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to exploit vulnerabilities or deliver further payloads.

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://botokaw.ru/strik?utm_term=harry+potter+germany+2019+game PDF link annotation
    • http://doucheop.xyz/how_do_you_reset_an_outdoor_sensor_lightztflf.pdfIn PDF document text
    • https://tudaluvakagovax.weebly.com/uploads/1/3/4/6/134614365/sujif-vuwagukugure-sukobiw.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/punonunukotekopoxudenadesndwq.pdfIn PDF document text
    • http://lasns.fun/thyroid-s_sriprasit_pharmaddgyh.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/tumimafox.pdfIn PDF document text
    • http://liwurivosopap.medianewsonline.com/87258329329.pdfIn PDF document text
    • http://ijmalan.xyz/2929842707x7mk3.pdfIn PDF document text
    • http://poopo.ru/what_are_the_3_types_of_organizational_structuresvpned.pdfIn PDF document text
    • https://gatamerat.weebly.com/uploads/1/3/4/0/134000446/folilaziboved-gadapipipupuz.pdfIn PDF document text
    • http://goodik.fun/how_to_get_a_helicopter_in_gta_5_cheatnsbdu.pdfIn PDF document text
    • https://futinubub.weebly.com/uploads/1/3/5/3/135328842/439f99eef4ad11.pdfIn PDF document text
    • http://hamsterbig.com/zakabola01wm1.pdfIn 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
    • https://s3.amazonaws.com/jolunenafobuw/zurededowu.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/singular_and_plural_sentences_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/driver_booster_3_baixaki.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/after_effect_template_free_logo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EF 5212 bytes
SHA-256: 7278cabb3973ab80429425551c1c2d342833fa543708cc58176bd9fb777a5e6b
font_01_sfnt_off0000f294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF294 10352 bytes
SHA-256: 5da91ac2daf7950e54777659c5b7611237d9b24c04ea843d490488d57f51940f
font_02_sfnt_off00011608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11608 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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