Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc28744fe61b7049…

MALICIOUS

PDF

81.5 KB Created: 2021-03-10 21:12:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: a709f42145b45a829daad0a7ce348db8 SHA-1: b930e8848f40b1cb79e641bf7cf2d29ccf9a5aa4 SHA-256: fc28744fe61b7049bc79941246dd0a6ce8f81eb274584b73629a4dc29fe1f0eb
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs that point to other PDF documents, likely for SEO manipulation or to distribute further malicious content. The presence of multiple external links on disposable hosting further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://pelibifir.ru/wix?keyword=the+bourne+supremacy+bangla+pdf PDF link annotation
    • http://zakixezurel.iblogger.org/24824945491.pdfIn PDF document text
    • https://cdn.sqhk.co/juselivo/jajjrhg/92488314826.pdfIn PDF document text
    • https://cdn.sqhk.co/laxiroroweno/gghdY27/56035451400.pdfIn PDF document text
    • http://wodebawoxisire.22web.org/el_hobbit_3_pelicula_completa_en_espaol_latino_youtube.pdfIn PDF document text
    • http://tawilexupo.iblogger.org/how_to_answer_about_yourself_interview_question.pdfIn PDF document text
    • https://cdn.sqhk.co/moxasapiwer/icLwicO/beamng_drive_alpha_crash_testing_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_01295dfbb9f04e6c8e941b362d478444.pdf?index=trueIn PDF document text
    • http://winikejotediteg.rf.gd/what_happens_if_your_tracfone_expires.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/444cd367-f44a-4a3d-ac0a-adcaf2661ef4/fudisadagesowemuzigibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae531c23-2715-426a-a6c7-0814fe6e48a5/what_is_the_process_of_emdr.pdfIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_05ea3c29b4b942c98e1204dce9e81e60.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6219a7f7-22df-4445-ab0a-4b78c6420e04/can_i_make_an_appointment_at_the_dmv_pa.pdfIn PDF document text
    • http://pejonoma.epizy.com/simple_bootstrap_login_form_template.pdfIn PDF document text
    • http://wawutanow.epizy.com/81780639467.pdfIn PDF document text
    • https://1261df91-4e32-40b2-8b8a-4050d3c54cbb.filesusr.com/ugd/df69c1_0e8a5e58363b4db6916a2cdbcf221224.pdf?index=trueIn PDF document text
    • http://joveviziw.epizy.com/ncis_new_orleans_episode_guide_imdb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb086003-081e-48a1-8fe4-eed9987607b2/mogawowisetuwijodal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6bc1af6-7886-452b-89b8-705b4d816188/qu_es_un_autorretenedor_de_iva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a80cae30-1145-4361-beb1-d04abe401b81/como_hacer_un_bosquejo_biblico_para_predicar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ba60f6b-e427-47ba-a669-5f4ce9311453/how_much_does_it_cost_to_repair_a_recliner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/756e9201-e310-45a0-86af-26ee4d466277/lamexapiketizovumotazuto.pdfIn PDF document text
    • http://xagivetiji.epizy.com/79152223114.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_off0000ffbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBE 5760 bytes
SHA-256: cb771f9985dda207b06b4fd31a5d77d00535b1d84e6afce6f7566ebd4e1e61f4
font_01_sfnt_off00011327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11327 11056 bytes
SHA-256: 0798dc4e9929c4fc87d613a3c04501f6954b8dc4a753af2a1e9b7b4b0ded3af6