Malicious PDF — malware analysis report

Static analysis result for SHA-256 4624b6cd953e4c3c…

MALICIOUS

PDF

89.6 KB Created: 2021-04-05 01:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f2fde5dcf113feed88507dbca92221c4 SHA-1: b7a60bdaf46d78a4fc95fac900733ba536d6e88a SHA-256: 4624b6cd953e4c3cdc0a919d862a644ef2acf52d7f28597a6fe8897c0e8d6f67
166 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for distributing malware or phishing content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be part of a multi-stage attack where an encrypted archive is provided, with the password intended to bypass gateway scanning. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://druttle.ru/wix?keyword=bloodlines+pdf+descargar PDF link annotation
    • http://xolabakagiraw.iblogger.org/aiag_vda_fmea_handbook.pdfIn PDF document text
    • http://reredikulole.22web.org/nikon_dx_55-200mm_lens_not_focusing.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/jazitelaluronul.pdfIn PDF document text
    • http://pokawibu.iblogger.org/addressing_modes_of_80286.pdfIn PDF document text
    • http://dvestideyli.xyz/9391782232222ml9.pdfIn PDF document text
    • https://xidelora.weebly.com/uploads/1/3/5/2/135296398/c7f1508e18c7c.pdfIn PDF document text
    • http://detonicufficiale.website/how_to_crochet_baby_booties_for_beginners_step_by_stepfucwz.pdfIn PDF document text
    • http://sodaapp.club/wu_tang_clan_hulu_castec3ts.pdfIn PDF document text
    • http://defi-bet.world/94284687467s01m3.pdfIn PDF document text
    • http://girlita.space/3161538089708lwr.pdfIn PDF document text
    • https://nazolaruwesibag.weebly.com/uploads/1/3/1/4/131453197/4105739.pdfIn PDF document text
    • https://vepufekuso.weebly.com/uploads/1/3/0/7/130775624/261ea.pdfIn PDF document text
    • http://storeplus.pro/80982615986mltkf.pdfIn PDF document text
    • http://koreanluxe.com/the_predominant_theme_of_the_road_not_taken_is_choicesl5hgv.pdfIn PDF document text
    • http://teenagetutor.online/kozadimuxwv8w.pdfIn PDF document text
    • https://wewodagib.weebly.com/uploads/1/3/4/2/134266566/42c09c7a2.pdfIn PDF document text
    • http://elerctum.org/descartes_meditation_2_wax_argumentozlbi.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
    • http://fodapimogu.rf.gd/mathematical_logic_problems.pdfIn PDF document text
    • http://sadamenukovizep.epizy.com/viewer_toolbar_title_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/283dc37d-d4bf-4288-8120-e1252685bd32/bbg_training_guide.pdfIn PDF document text
    • http://dinixebun.epizy.com/weather_report_for_ballarat_today.pdfIn PDF document text
    • http://jigiwema.epizy.com/fasos.pdfIn PDF document text
    • http://wuzuwoxijotefik.epizy.com/12724272179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38bb6cdf-6358-4185-b477-b67995c56686/kisiwutusuwax.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DE 5080 bytes
SHA-256: 796c31cdb5d7a3f65aba622b42e227592bb44e9981af3e3ddd3c2259f4adb420
font_01_sfnt_off00010926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10926 12736 bytes
SHA-256: 8d090ba8ae5a59b3483d0d78b34a330011652bd0991d33530d4f9d9c3c9ee0e2
font_02_sfnt_off000132fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132FA 16404 bytes
SHA-256: 9a675139c81b47783c63f5cc16f2f9edf588b4b97dd501cae6bc8c77d3eba056
font_03_sfnt_off0001491b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1491B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333