Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad0e0784ef1a239…

MALICIOUS

PDF

81.2 KB Created: 2021-03-22 09:18:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c924c62a6781f1d21e8c91e0b06f42af SHA-1: 1cb1419ba689f0bc138fb982f3c9c223dad27852 SHA-256: 0ad0e0784ef1a2391c280ae3e0b0fb1ae6047e623875b724a808062612bd57fe
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF structure itself are indicative of an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://druttle.ru/award?keyword=anticoagulation+in+atrial+fibrillation+pdf PDF link annotation
    • https://cdn.sqhk.co/niririga/Dgc6hbH/35507314264.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/Dhhchq3/riwex.pdfIn PDF document text
    • http://mitefakosutupot.22web.org/25634375234.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/XnG8oia/8533620581.pdfIn PDF document text
    • http://tofugezupeb.mygamesonline.org/how_do_i_connect_my_netgear_wifi_extender_to_5g.pdfIn PDF document text
    • http://beguwidip.scienceontheweb.net/bescherelle_grammaire_francais.pdfIn PDF document text
    • http://wewofif.scienceontheweb.net/fudoferajegamewujepeb.pdfIn PDF document text
    • https://cdn.sqhk.co/jivaduzar/idhgifF/25346420356.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/f12e4ba2-603c-49c2-8ee5-08288646251e/what_to_do_when_a_stock_tanks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e50fb99-ee2a-463e-959d-7d9b463467b4/25460212215.pdfIn PDF document text
    • http://sujawokasafu.onlinewebshop.net/que_es_materia_en_quimica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caab24a6-1ac7-4df1-a48a-ff73e4c2e30c/focusrite_scarlett_solo_2nd_generation_driver_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a170d0fb-4ff2-4dbf-9ed2-44e234a9e92d/46252844924.pdfIn PDF document text
    • http://nasakil.rf.gd/paint_dot_net_open_gif.pdfIn PDF document text
    • http://gelonixaj.rf.gd/the_taming_ofthe_shrew_act_2_scene_1.pdfIn PDF document text
    • http://lonodaletitofa.rf.gd/lirore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0eef186-3803-4307-b42d-beb9013b4275/why_wont_my_verizon_remote_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c39a7fe4-c50c-4947-a888-fd98491536df/daffynition_decoder_math_worksheet_answer_key_page_62.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fffc6de9-8fe3-4280-bf56-80545e6d766b/the_death_cure_chapter_1_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca77e96e-8c6a-4225-971b-bd2ea15b071c/gudalo.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_off0000ffcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCC 5272 bytes
SHA-256: 61f7caaac2327fd3c0b12095a52fa0b1459f93e8cdf6b71920162a269875f3f8
font_01_sfnt_off000111c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C7 11372 bytes
SHA-256: 4fdfe4a341f89da2f19446186a20bacad53b00a87df25388b0b5257f13ae01de

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