Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce671d274664d5a…

MALICIOUS

PDF

77.5 KB Created: 2021-04-02 04:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 503d5fc164067faf6654e6d4b55bef33 SHA-1: 89d17f1f1b8e0adf39a2fa27f855cfbcb33c5204 SHA-256: 7ce671d274664d5a529340b884e2795250e2c67417ddb58522be39ea5da2759c
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable domains, suggesting a link farm or redirection scheme. The primary URL, https://mezovuduw.ru/aws?utm_term=good+ideas+for+science+fair+projects+3rd+grade, is presented with a search query that attempts to disguise the malicious intent. ClamAV and ML classifiers strongly indicate maliciousness, consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/aws?utm_term=good+ideas+for+science+fair+projects+3rd+grade PDF link annotation
    • http://finomimetafix.sportsontheweb.net/69794919087.pdfIn PDF document text
    • https://tubozabuzimez.weebly.com/uploads/1/3/4/8/134878922/topedoge.pdfIn PDF document text
    • http://temimiwug.iblogger.org/applied_social_science_book.pdfIn PDF document text
    • http://vazagitomis.mypressonline.com/cayuga_lake_wine_trail_map.pdfIn PDF document text
    • http://sewatumafuta.medianewsonline.com/nomokadexuzutuxami.pdfIn PDF document text
    • http://pobadabodoz.scienceontheweb.net/voragifufonekusemelav.pdfIn PDF document text
    • https://sanufelileme.weebly.com/uploads/1/3/0/7/130775971/sisam-fexoto-pojilewinedubem.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/91852685-5165-44ed-a1a3-509e31a3d685/lavalitojunatevowijurumam.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/watchman_nee_books_collection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b25ff497-f25a-40a7-abd8-d0ec584b49f4/hp_laserjet_1100_cable_adapter.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/gosekumaximemixenejunup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5599195f-8315-4bf7-ad67-94903fad5103/asp.net_web_api_tutorial_c_corner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4842489-fcf5-4c88-a7a4-ec7688bcda9c/25589914631.pdfIn PDF document text
    • http://guseboses.atwebpages.com/powerpoint_presentation_examples_for_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/998ab587-285e-47c0-98e0-386796daca8c/we_make_the_road_by_walking_chapter_5_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e631190-44d6-4526-b238-e79611ab5888/tissot_1853_t_touch_smart_watch_-_z_253_353p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52cb6f69-6134-4f18-98d6-08290e4b12d3/16201102574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ecac3c-d445-4e49-8321-3445ce088aac/39521623536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e51bf32-6880-4c33-b250-1c20e1fafcbd/how_to_use_premiere_elements_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6117db38-ec5a-420c-be9b-099d7b95988d/51603505239.pdfIn PDF document text
    • http://widagutevutedik.epizy.com/el_conde_de_montecristo_pelicula_online_gratis.pdfIn PDF document text
    • http://tiruweditivunaw.myartsonline.com/625359120.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_off0000f17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17A 5564 bytes
SHA-256: ace0ef0970833c0640f5618d9ea49b50a0e4ab95a78cc71d1a26f675282f93c8
font_01_sfnt_off00010480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10480 10628 bytes
SHA-256: a7d2dc2985bc1a829cc6584f39c8e2ad07b29d00321cd649bbf669048c14eb3b