Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7517c0e6d0812b3…

MALICIOUS

PDF

77.8 KB Created: 2021-03-02 21:22:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f63aad92b71318e883ba02f33d879b41 SHA-1: 5fac58a7ee2347f32ef414ab9eb5716e38eefc50 SHA-256: d7517c0e6d0812b3c6176482559ad01783e415207c9281147df06cbf9ec47474
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF document contains multiple heuristics indicating malicious intent, including random and disposable link farms pointing to PDF files. The document body, though partially obfuscated, suggests a lure related to programming an Emerson TV remote. The presence of numerous external URLs, many hosted on disposable domains, strongly suggests an attempt to redirect users to malicious content or phishing sites, likely to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://botokaw.ru/123?utm_term=how+to+program+att+remote+to+emerson+tv PDF link annotation
    • http://itawomen.fun/konodutosibowijakukuporortvxix.pdfIn PDF document text
    • http://dream-stat.ru/89912821626uskul.pdfIn PDF document text
    • http://girlita.space/9851010679uk692.pdfIn PDF document text
    • https://cdn.sqhk.co/soxemudu/ThdJYpC/69350429552.pdfIn PDF document text
    • http://therarbooks.com/pozab6x2xb.pdfIn PDF document text
    • https://cdn.sqhk.co/fadanade/xjqgfje/58120127480.pdfIn PDF document text
    • http://trydouche.xyz/260907696069dks.pdfIn PDF document text
    • http://avit0.cc/handwriting_sheets_for_2nd_grade9wyft.pdfIn PDF document text
    • http://miribut.mywebcommunity.org/workpro_4000_chair_assembly_instructions.pdfIn PDF document text
    • http://goodnatural.space/celiakia_dieta6qsnj.pdfIn PDF document text
    • http://kartaidatodemeleri.com/61558643318zf6yz.pdfIn PDF document text
    • http://paktum.pro/vituvolitcyejd.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/hfhieAZ/best_sudoku_online_games.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikewe/gcfha15/45589563576.pdfIn PDF document text
    • http://shopsmmv.site/blank_periodic_table_editableibdh6.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/takateg/85970694883.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/62968109983.pdfIn PDF document text
    • http://jigisasamupor.onlinewebshop.net/cuanto_es_30_gramos_en_cucharadas_de_avena.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_off0000e6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EB 4960 bytes
SHA-256: e980467e0b5409f962dbcf1cdf91961ed01d1d56325c6475e961796caa3087d7
font_01_sfnt_off0000f7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BA 10496 bytes
SHA-256: b601b78a951bd9946d3ca9d597cda3e07f6670dfcc0f2347a6baa6f7333e22f7
font_02_sfnt_off00011bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB1 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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