Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbc5fb31bfbacc1…

MALICIOUS

PDF

75.2 KB Created: 2021-03-18 07:52:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 364e76ae2c10d0699635bf251cb0a464 SHA-1: 1d85d7296cfb0eb468b4ddac9fdc0bb07c39c6c3 SHA-256: bbbc5fb31bfbacc1d7cf8ecec0be94239c7355b4cb578e6a86234cbea547ba66
126 Risk Score

Malware Insights

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

The file is a PDF with a high ML score and ClamAV detection indicating malicious intent. It contains numerous embedded URLs, including 'https://resalured.ru/award?keyword=increasing+confidence+pdf', which are likely used to redirect users to phishing or malware hosting sites. The PDF structure and embedded links suggest a phishing lure, possibly disguised as an award notification or a report.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/award?keyword=increasing+confidence+pdf PDF link annotation
    • http://gojovujewinunuj.mygamesonline.org/55844525406.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/90812032563.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374380/normal_5ff4f571ab8a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411937/normal_6021a8d9c43cd.pdfIn PDF document text
    • https://cdn.sqhk.co/nunagike/QeEOice/damage_report_template_free.pdfIn PDF document text
    • http://rajenajodaf.iblogger.org/what_type_of_battery_does_apple_tv_remote_take.pdfIn PDF document text
    • http://tonozezoziw.iblogger.org/41729758704.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383138/normal_5fff3ad1c4866.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/what_gun_companies_does_beretta_own.pdfIn PDF document text
    • http://sikevemekoma.mypressonline.com/lumowemikebabis.pdfIn PDF document text
    • http://morasuxod.getenjoyment.net/43389863800.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxogatuv/fPjiIgd/nixavonapa.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/appositive_phrase.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421970/normal_6006d7bf0c606.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzosiboweja/bJfhjih/shooting_3d_video_with_two_cameras.pdfIn PDF document text
    • https://cdn.sqhk.co/pefemezized/ii7hcgj/13459375555.pdfIn PDF document text
    • http://tadugebakonuged.getenjoyment.net/66668879127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475997/normal_600e8e0f82349.pdfIn PDF document text
    • http://lotobajigufar.mywebcommunity.org/cebada_malteada.pdfIn PDF document text
    • https://cdn.sqhk.co/bidelefo/dijhaw4/aruba_networks_ap_135_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sisofejijo.epizy.com/sparx_sandals_catalogue.pdfIn PDF document text
    • http://lokemupuwife.rf.gd/hp_laserjet_pro_400_mfp_m475dn_driver_download_windows_7.pdfIn PDF document text
    • http://dasabenanej.epizy.com/what_are_the_subject_combination_for_psychology_in_jamb.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98E 5228 bytes
SHA-256: e6897b6b9f0ac5b99ad1ca827f7aec43ae9ef106306b0bfe71f6f303b81e2b61
font_01_sfnt_off0000fb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB67 10664 bytes
SHA-256: 15f5e243624fad7df502c8ec998e69ad01b24737a9897e758b6f9d13b4b7197d

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