Malicious PDF — malware analysis report

Static analysis result for SHA-256 f288383509504fe7…

MALICIOUS

PDF

82.8 KB Created: 2021-05-04 02:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e73cd9758a619b6f64c336f5812cf1be SHA-1: e5dd546189974a8676b2a4f6471ba434e9730a8b SHA-256: f288383509504fe782f04cdcefde9ccfe25cc8a6697440ae83609f4519d806eb
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or redirection attempt. The presence of external URIs and the overall structure indicate an attempt to direct the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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=1734+aentr+aop PDF link annotation
    • https://cdn.sqhk.co/zamokaxu/bijYdQ4/how_can_i_download_telegram_chat_history.pdfIn PDF document text
    • http://itali-big.space/16270959799t6tkd.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/rhiihgf/little_fox_chinese_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423750/normal_60199973d6322.pdfIn PDF document text
    • https://jupiretuvivu.weebly.com/uploads/1/3/5/3/135383394/6633488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459792/normal_6023f9f008c08.pdfIn PDF document text
    • http://scoretdho.best/dirt_devil_power_max_rewind_pet_bagless_upright_vacuum_reviews6iftv.pdfIn PDF document text
    • https://noromilo.weebly.com/uploads/1/3/4/5/134587763/494567125.pdfIn PDF document text
    • https://cdn.sqhk.co/lokabawopup/jgiejaY/bekamalen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453134/normal_5ff8a803d7c01.pdfIn PDF document text
    • http://discount50.pro/kijakulujinivovodapev1u8.pdfIn PDF document text
    • https://fasexunatosupa.weebly.com/uploads/1/3/1/6/131606354/6494208.pdfIn PDF document text
    • https://cdn.sqhk.co/vekokizijam/dhuvlBF/84999116924.pdfIn PDF document text
    • https://mobisikude.weebly.com/uploads/1/3/1/6/131606420/a5eb368ea09dde5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497071/normal_6003b3cf1b2ce.pdfIn PDF document text
    • https://wabelurotetef.weebly.com/uploads/1/3/4/6/134693048/891307.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://nazonuretowu.epizy.com/4k_background_wallpaper_for_pc.pdfIn PDF document text
    • http://zabukek.rf.gd/cisco_switch_2960_configuration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/what_does_0033_mean_on_espn.pdfIn PDF document text
    • http://baredijela.rf.gd/zasulelovimo.pdfIn PDF document text
    • http://xixujoteb.epizy.com/31585369622.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/3928551351.pdfIn PDF document text
    • http://sizilave.epizy.com/xupowesebivupa.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_off0000f954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF954 4632 bytes
SHA-256: a9d95bb54f9615cf12adedbe8de0ef3f9c72529d6be78f484c8518daed3f35b9
font_01_sfnt_off00010916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10916 10888 bytes
SHA-256: 76bb2fade3738688f9fcf989d6428f076c146c2d19f60ff5776eba40549a9cd3
font_02_sfnt_off00012e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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