Malicious PDF — malware analysis report

Static analysis result for SHA-256 792750d9d22fc7f3…

MALICIOUS

PDF

79.7 KB Created: 2021-03-02 13:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f85f82c2fb26d271c12bfb2ac6be41f9 SHA-1: 0ad614219b9ccd16710e9bed9bdeb593cd9b9cb6 SHA-256: 792750d9d22fc7f32bbaf752cd308806eef7ee841682ef798ad6425fc4436ac8
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely used to deliver a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, contains keywords related to a product search, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://mezovuduw.ru/award?keyword=monster+energy+500ml+price PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403117/normal_5ff107dbae4de.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/what_does_it_mean_when_it_says_application_under_review.pdfIn PDF document text
    • http://votixibutiro.medianewsonline.com/power_pressure_cooker_pot_roast_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425237/normal_603388da69bea.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/4489416221.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/roland_barthes_quotes_love.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/all_modal_verbs_in_english_grammar.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/32584382580.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/87865421355.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/2_times_tables_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gototura.myartsonline.com/dukirezawadomizeporefu.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/how_to_set_up_a_wildgame_innovations_trail_cam.pdfIn PDF document text
    • http://pimobepetokonud.myartsonline.com/71881087526.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/3723067657.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/xomiwolalokazi.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/sevozusudafut.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD946 5416 bytes
SHA-256: f1d3c7488e54270fb55c32363a1deca0cc7ad98eac7a1cae97ab0c44435e412b
font_01_sfnt_off0000ebbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBD 15492 bytes
SHA-256: 60743736f74bf884c080f22a6477459add84d44b010e72e09f7c4ea836adb197
font_02_sfnt_off00011c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C15 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e

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