Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de826ee96a02161…

MALICIOUS

PDF

74.5 KB Created: 2021-03-17 15:08:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8b8612a7dc55485d095a0b48368780a2 SHA-1: b7240b0e56a8eddf498e225ec534cb856b002622 SHA-256: 7de826ee96a02161d66e1268095ce8aca080831825fa2a4238f589bf344ca306
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting and identified as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and the link farm heuristic suggest the primary goal is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://maypoin.ru/strik?utm_term=what+does+jesus+say+about+eating+unclean+food PDF link annotation
    • https://cdn.sqhk.co/pifonode/zja9heM/rutud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427313/normal_5fd832130d66f.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/fVgiges/japagasoferunavi.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/loloderur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384483/normal_600e300cad30f.pdfIn PDF document text
    • http://dezowem.medianewsonline.com/simple_past_exercises_com_gabarito.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/how_to_service_esc_on_2010_malibu.pdfIn PDF document text
    • https://cdn.sqhk.co/nububufi/eRhggiu/gepujibevafovewowojepur.pdfIn PDF document text
    • http://funiwigurogamu.iblogger.org/police_incident_report_narrative_example.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gafigozigu.epizy.com/transformers_bot_shots_battle_game_online.pdfIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_c81e0c21362344ca8f03c01c627e0869.pdf?index=trueIn PDF document text
    • http://luturuwuxas.epizy.com/ingress_prime_guide.pdfIn PDF document text
    • http://lamekukibudinos.epizy.com/calligraphy_writing_tutorial.pdfIn PDF document text
    • http://dezagifuten.rf.gd/how_to_fix_mitsubishi_electric_air_conditioner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ff7a88a-0468-44ed-bb90-8e4e740bf34b/learning_radiology_william_herring.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e111ab8e-f396-4e08-814b-5a3758844cea/chicco_keyfit_35_infant_car_seat_-_iris.pdfIn PDF document text
    • https://ac734925-007a-49fa-9a6b-2340142042ec.filesusr.com/ugd/ea78e0_8bf6ac3094494fd5bcf35417bc26adaf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae206cdf-3082-41f8-a2d6-02f47bd75403/cracking_the_sat_chemistry_subject_test_16th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b795dd7b-4adb-49c2-8188-d3a67008fbe4/what_is_universe_in_research.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_off0000e4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DA 5516 bytes
SHA-256: 5571e291bd1c6aff94a041190ecb2dc262d7235ae68f44500075b610ba59618d
font_01_sfnt_off0000f7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BC 10908 bytes
SHA-256: 3f6e5ccf7ca16a978c8ba9b9bd1f44aeebc3316c7e72036d82d8a0e95335160f

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