Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e991f723520b76…

MALICIOUS

PDF

72.9 KB Created: 2021-03-28 08:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 04d078a4261dc20dee1f76ec679b8fa3 SHA-1: 6d21fe800d2d51550df82f6fbc054b416bf79096 SHA-256: 05e991f723520b768348e998b93fc8b2e746948d9691532e4edbb3f160aab5d4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external URIs pointing to disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure, likely attempting to redirect the user to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/award?keyword=athlean+x+workout+routine+pdf PDF link annotation
    • https://cdn.sqhk.co/ruvojeve/hegjObQ/hello_in_korean_when_answering_phone.pdfIn PDF document text
    • http://woziwowariv.sportsontheweb.net/gawadizanipoxulerakidudo.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/how_to_set_alarm_on_panasonic_cordless_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/pumevigatare/7yTia0e/blue_color_code_in_android_studio.pdfIn PDF document text
    • http://heliusdesign.ru/how_many_legendaries_are_in_ultra_sunjnxnq.pdfIn PDF document text
    • http://nutosuvitiraj.scienceontheweb.net/fajoganu.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/grzijhb/3d_pool_ball_mod_menu_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456686/normal_5fe7d36b413a7.pdfIn PDF document text
    • https://cdn.sqhk.co/mumaxeje/RTiak0I/attestation_d_assurance_automobile.pdfIn PDF document text
    • http://dvertsoff.ru/potassium_perchlorate_acid_or_basenq9sb.pdfIn PDF document text
    • http://xasedogamif.mypressonline.com/aldehydes_and_ketones_nomenclature.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/hOKjcZ3/96614552931.pdfIn PDF document text
    • http://sarhello.online/apa_code_of_ethics_for_clinical_psychologistsyk719.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446494/normal_5fcfa44a1e400.pdfIn PDF document text
    • https://cdn.sqhk.co/dugarusa/hcihhcd/57226608235.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://texokobatogu.epizy.com/what_is_a_gimp_ahs.pdfIn PDF document text
    • http://kuvujibirili.epizy.com/kubernetes_cheat_sheet_linux_academy.pdfIn PDF document text
    • http://famebod.epizy.com/bb_q10_os.pdfIn PDF document text
    • http://tasebofav.rf.gd/nezepil.pdfIn PDF document text
    • http://xevorerokune.epizy.com/bmw_car_images_hd.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE146 5164 bytes
SHA-256: 1b384b8d21249a5010c6a90b3f99667263bb31523f9eeae0702b006c3d6af8ac
font_01_sfnt_off0000f2e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E8 10300 bytes
SHA-256: 8bae32d286cafc8b969c8ff1dbe47feb41cbeb7a99830b9a8e9814e3d537f80e

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