Malicious PDF — malware analysis report

Static analysis result for SHA-256 9874edb92ee891a5…

MALICIOUS

PDF

72.2 KB Created: 2021-06-09 22:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 292cb9e66d0f341ba144edff99496960 SHA-1: 52ce0bd576b5f45e1df3c18878d2308e04872dd7 SHA-256: 9874edb92ee891a5a5836e7cab92aff33378a8e54bcfa971137879fec88c61b6
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'https://inwebjor.ru/pbw?utm_term=doraemon+gta+download+apk', which is likely part of a phishing or malware distribution scheme. The PDF also exhibits characteristics of a link farm on disposable hosting, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://inwebjor.ru/pbw?utm_term=doraemon+gta+download+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488604/normal_5fd795561c371.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_60292bbd853e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/70256f41-49df-49be-a125-95fefe4c6462/vufakujogurusonagarusalap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/300e2811-0237-43cf-b952-b911b259fa53/dutusavonasepigamesobuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c33f271-d42e-48be-8f04-eeedf0a3b408/rinnai_electric_tankless_water_heater_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1092571c-5681-4ec1-a2be-b3c249f16b7c/zodesepuzilenuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ed31331-e399-49e3-960a-531b927655d9/what_is_the_lesson_of_the_story_the_two_brothers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dbe41ad-bdd5-4a95-8b5f-c5cf7582cd6a/sewing_machine_amazon_singer.pdfIn PDF document text
    • http://zanikofepaj.pbworks.com/w/file/fetch/144642270/82573032465.pdfIn PDF document text
    • http://jazufawaroj.pbworks.com/w/file/fetch/144875775/pinoy_tv_replay_abs_cbn_teleserye__50____Low__0.pdfIn PDF document text
    • http://mudowomuxexo.pbworks.com/w/file/fetch/144618438/mitasopakunu.pdfIn PDF document text
    • http://zobafolu.pbworks.com/w/file/fetch/144711618/61870305935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b1ff91-241e-4dec-9f2a-3225aece87ac/can_you_use_ps4_gold_wireless_headset_on_pc.pdfIn PDF document text
    • http://keborekudud.pbworks.com/f/present_continuous_tense_15_sentences.pdfIn PDF document text
    • http://jitijaloj.pbworks.com/f/big_hero_6_tamil_dubbed_tamilrockers.pdfIn PDF document text
    • http://pewamez.pbworks.com/w/file/fetch/144899853/joker_full_movie_tamil_dubbed_download.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_off0000dfae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAE 5256 bytes
SHA-256: 17a6a87b840dbb3a552ead272221b1e66db366a01cf60e0cbb6cc02c7c04e31c
font_01_sfnt_off0000f190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF190 10092 bytes
SHA-256: 59f517ce9520422b8344995a3c3b5c749e17c67615ea3e95d4ca7145daa07938

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