Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e1ab8a5f0c671bd…

MALICIOUS

PDF

79.5 KB Created: 2021-03-09 23:50:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5363858401d4dbedf7f06aae5aaf33d0 SHA-1: 4ce23051bda82800640648b80377d2278a077c37 SHA-256: 6e1ab8a5f0c671bde610138e9d6ef8ee4464bff822d354c723ad41778a0f1d22
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, potentially leveraging JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/123?utm_term=prevention+of+pregnancy+induced+hypertension+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411922/normal_5ffd71a0ed1d9.pdfIn PDF document text
    • https://tilijaxak.weebly.com/uploads/1/3/1/3/131381787/6349980.pdfIn PDF document text
    • https://cdn.sqhk.co/lojadisexudo/ihjghji/download_game_stickman_clash_mod_apk_android_1.pdfIn PDF document text
    • https://zolezuborejizo.weebly.com/uploads/1/3/4/4/134444688/povenerixutomuje.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/myron_mixon_bbq_rub.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/wlja3hx/beduwulosaxififefabo.pdfIn PDF document text
    • http://nutosuvitiraj.scienceontheweb.net/lipewijowaxojuzenew.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/ie6phgx/gewaxubitokure.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/english_grammar_in_use_elementary_fifth_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/kupuruvew/diaeaGw/bubble_bird_rescue_2_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/wasefago/5LCibih/49909582082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413368/normal_6038d6d33ecc5.pdfIn PDF document text
    • http://nitapida.mywebcommunity.org/vapunure.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
    • https://uploads.strikinglycdn.com/files/4e34cdd3-7c94-40a5-b672-18d520ea9e75/is_coffee_free_at_dunkin_donuts_today.pdfIn PDF document text
    • http://wegamaluperetuj.atwebpages.com/can_a_spark_ignite_kerosene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7f476db-2893-4ad0-a07c-f24bde7987d1/canon_mp470_ink_amazon.pdfIn PDF document text
    • http://gafodix.myartsonline.com/susomujavamokusopuzujore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c3361da-0473-4705-89ad-71ea02a276b7/nizezanegaroxafisiri.pdfIn PDF document text
    • http://movasedumanepe.onlinewebshop.net/defunatarug.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_off0000ee0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0C 5432 bytes
SHA-256: e829483e36ee96b1675b26eb5e4cc8d733b7f030445a4ce4f0a7aab83b41c01b
font_01_sfnt_off00010084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10084 9840 bytes
SHA-256: a44a456e9fc5a39a18ebe9de7e14f32f4cc12042f298eae876a2f2a3aadb05eb
font_02_sfnt_off00012246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12246 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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