Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d14be971b4b55b…

MALICIOUS

PDF

85.3 KB Created: 2021-03-16 08:05:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2ca39e7475a745bd5fdc1ec31a6cd2a8 SHA-1: 5381290972653245caf7cd71dc06357d2d6e0d4f SHA-256: 38d14be971b4b55b2c47b688edb627f89d08acc8d8103066870dd0b4a297f4f9
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, disguised with a game guide title, suggesting a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URI strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://gimoguvi.ru/123?utm_term=tomb+raider+definitive+edition+platinum+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374374/normal_602eedc247f8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505839/normal_5fd7885fe1dd2.pdfIn PDF document text
    • http://wewedaz.iblogger.org/masked_singer_lion_second_performance.pdfIn PDF document text
    • http://mebovedu.getenjoyment.net/ratibuzawopuxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426953/normal_600a664c1688b.pdfIn PDF document text
    • http://kopalirigel.mypressonline.com/pradeep_fundamental_physics_download.pdfIn PDF document text
    • http://lamigix.iblogger.org/robinair_34788ni_wont_recover.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386607/normal_5ffd2ddd94413.pdfIn PDF document text
    • http://puzexijabin.mypressonline.com/21970496361.pdfIn PDF document text
    • http://dasuwupozu.22web.org/5441276974.pdfIn PDF document text
    • http://laluwaraselolar.mywebcommunity.org/xamujonuwewidebova.pdfIn PDF document text
    • http://wurilozi.scienceontheweb.net/sharepoint_framework_tutorial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370317/normal_60400e6706fdd.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://s3.amazonaws.com/donarepemi/the_standard_miami_beach_membership.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70346752-66e9-443b-aeb2-b004d607bac9/how_to_use_samsung_smart_tv_remote_app_android_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/489bd4c2-49cf-43da-8d07-97470faae5d8/jesus_was_a_child_like_me_song.pdfIn PDF document text
    • http://fopagozijudiri.epizy.com/4219960748.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/14584519521.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/free_download_component_sketchup_8_3d_warehouse.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/32716971058.pdfIn PDF document text
    • http://pewubep.rf.gd/vosegonepadeletiw.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/chronic_hepatitis_c_treatment_guidelines_aasld.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/74061148613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/121db6b2-2911-4f20-840e-41ac3a30803c/en_el_tiempo_de_las_mariposas_resumen.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/harry_potter_and_the_philosophers_stone_netflix_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dccaa97-51ef-4c9a-b472-e3b900c07f89/54909604369.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_off0000ffd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD3 5212 bytes
SHA-256: 959f7d4e2877a6993aac994ea0b540b526c6e7ba5bd7f0f5f62c3fd2303fd8a1
font_01_sfnt_off00011174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11174 11288 bytes
SHA-256: 79cbd2615f951687660d294db3e05be8158f67a83b4050df4ffa06067ef97e28
font_02_sfnt_off00013769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13769 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333