Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e76eb1100d2a6e4…

MALICIOUS

PDF

80.3 KB Created: 2021-02-04 23:45:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 49cfa2ef7cb8e13538da0e92af1216da SHA-1: 7166e3e7a7c8324f3efbccd8eb4fe354fc1e1fac SHA-256: 0e76eb1100d2a6e4905b2e5b76232b52f0878677bf890eba2a99af3182f119cd
134 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 functions as a link farm, presenting numerous links to disposable hosting, with one prominent URL leading to a potential payload disguised as a guide. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_URI heuristics further supports this, suggesting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=black+desert+mobile+force+enhancement+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404753/normal_5feb48870b031.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/KjfghIs/realm_grinder_artifact_set_unlock.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475730/normal_600fc1f7c7e77.pdfIn PDF document text
    • https://cdn.sqhk.co/zevolazezag/VMggkWa/palabebo.pdfIn PDF document text
    • http://discout.online/momento_de_inercia_circulolx510.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413575/normal_60185d2fa17a9.pdfIn PDF document text
    • http://ewop.space/nibojevirrna.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/bhf1hgP/man_down_rihanna.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/VhfwAjh/pacioos_sea_level_rise.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://piterar.epizy.com/35817991933.pdfIn PDF document text
    • http://kurujabarufuxe.rf.gd/ninizesaladinibogafopituz.pdfIn PDF document text
    • http://goguvero.epizy.com/basic_accounting_equation_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/niwitujulegerixukupuzivo.pdfIn PDF document text
    • http://mekidojakad.rf.gd/kelizeki.pdfIn PDF document text
    • http://junimuji.rf.gd/doloforowul.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/ttm_squeeze_indicator_free_mt4.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_off0000d8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B7 2900 bytes
SHA-256: 68d094faf81d2ea9f62e68ee4e789e40b6192f27e323b9e50c58fbaa8f881837
font_01_sfnt_off0000e2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FA 5688 bytes
SHA-256: abc852fa31e0cc9c3b0f9ec05ffcf9ab75a3df146b85f1730f023185c7e60719
font_02_sfnt_off0000f62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62E 11132 bytes
SHA-256: 5a203f733e049d61acbdfb40296faf1e8b32957c182710a96aa37bb8bbd93e9d
font_03_sfnt_off00011c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C61 16160 bytes
SHA-256: 31f54bf1b2a0bd5fcefce680aa7bc0ab7b2c48a0f9a6877104dd616c0c0a5462

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