Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d73a62e4ab3925…

MALICIOUS

PDF

91.5 KB Created: 2021-03-05 12:19:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8ad546364d35e4ef0a534ea35f83ee2a SHA-1: 77777f164444620c748b74deacfab1bf64701e8a SHA-256: 57d73a62e4ab39251bb6365809a60d15619af77cc36f02fdc4f82f15d40dab7c
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or malware delivery attempt. The embedded links, such as 'https://dafemum.ru/123?utm_term=how+to+program+genie+intellicode+garage+door+opener', are designed to redirect users to malicious infrastructure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a tactic of using numerous disposable domains to host malicious content, likely for SEO poisoning or to evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than 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.
  • 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://dafemum.ru/123?utm_term=how+to+program+genie+intellicode+garage+door+opener In PDF document text
    • https://kazofinuso.weebly.com/uploads/1/3/4/3/134369681/jubatugetevuxo-galifufazenewav-bajexitugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505326/normal_5ff10671342a7.pdfIn PDF document text
    • https://dirarogevuku.weebly.com/uploads/1/3/5/3/135351224/2570290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444882/normal_600bfe30cf7ad.pdfIn PDF document text
    • https://pizavanaxuvilu.weebly.com/uploads/1/3/5/3/135386491/pobawuzesiweti_matenezufu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382418/normal_5fdf29d30e03b.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/jakiwigaregoko43guq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386334/normal_5fecb53a2fe77.pdfIn PDF document text
    • https://dexatasudawuge.weebly.com/uploads/1/3/4/4/134477966/susadugebu.pdfIn PDF document text
    • https://gidepezugubuwo.weebly.com/uploads/1/3/4/7/134766768/1942594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467612/normal_6032d0df8861b.pdfIn PDF document text
    • http://sokfresh.fun/vesagujiwijexujz6vte.pdfIn PDF document text
    • http://zojekepilawa.iblogger.org/how_big_is_the_prime_rib_at_boston_market.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420752/normal_600a0c99cef67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412183/normal_6018b04427862.pdfIn PDF document text
    • http://rokonagusedat.22web.org/dodge_ram_repair_dubai.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410006/normal_5fd1424a4265b.pdfIn PDF document text
    • http://motivawka.online/hp_deskjet_f4580_wireless_setup_androidjm2mw.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/4bb6b6da-a0c1-4d93-ae67-b97c0ee9779b/giwola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f25cbcc-14a0-4154-af09-62fa8370e560/zemowiwe.pdfIn PDF document text
    • http://lojupodinitaxug.epizy.com/eu4_center_of_reformation_event_id.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cecfbf8b-56e5-44b2-a7b6-164101a32b85/sijosasivigudulurala.pdfIn PDF document text
    • http://zefepelifepo.rf.gd/91676975335.pdfIn PDF document text
    • http://mifetominugumow.epizy.com/secure_sensitive_denture_adhesive_reviews.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D4 3204 bytes
SHA-256: 9c2ac01224ca69ef2be8da4c58f2c669794f77f284d4f2f779102301e31c640a
font_01_sfnt_off00010248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10248 5056 bytes
SHA-256: 4ea3ebd7aca6d849a421175af5a390737dc9cf357d86da8269efe65a39ed6956
font_02_sfnt_off00011362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11362 12444 bytes
SHA-256: 5f0dda7544dd753ed8186f114253af341ae9c3182cfc4027618353008f3532bb
font_03_sfnt_off00013baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BAA 16248 bytes
SHA-256: d44ea5215bf2fdd555e489ff608ded713598f5a504eaa6f636767760daf27d1e
font_04_sfnt_off00015110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15110 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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