Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2a90ef945e1446…

MALICIOUS

PDF

75.4 KB Created: 2021-05-09 09:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a62271f9d540e719fbadc3992e93c536 SHA-1: 8d4b1eaf33b297433056412cdcd80f1520d34b9a SHA-256: 4b2a90ef945e1446e54d356d5cf012418361822ce2a8cce0be8cd7a76a9cfa8b
96 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An embedded URI points to a suspicious domain, likely for phishing purposes. The document body contains garbled text, suggesting it is not intended for legitimate user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/strik?utm_term=the+open+window+author+name PDF link annotation
    • http://xivazokib.medianewsonline.com/buku_andrea_hirata.pdfIn PDF document text
    • http://doridusa.medianewsonline.com/alice_miller_libri.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/4bed9309-1cb8-4398-85d5-53524946b2db/67547970296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ccde491-52df-4931-8581-c0bd4dffa1ec/little_house_on_the_prairie_season_5_episode_23_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a121cc4-0069-4a3a-b804-061d3e6d5bff/best_soft_tip_dartboard_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30793e91-4103-4f49-bc03-e8a5fe48933e/nostalgia_electrics_hollywood_series_kettle_popcorn_maker_hkp200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0fb9c8d-e3f1-49d8-bcae-dbcfc631190c/lista_de_verbos_irregulares_en_ingles_pasado_participio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26cbe664-8849-42de-a209-42b8736b5619/sibuluzaduven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e768a348-a317-4d90-a288-01274e8042d8/what_are_the_factors_that_influence_ethical_behavior.pdfIn PDF document text
    • http://kelajerifa.epizy.com/xafofezaju.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/37213204887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63bdacbf-b7bd-424d-9ece-21359d58de83/husqvarna_sewing_embroidery_machine_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21352f46-fe0b-4267-ae3b-747b6b46f470/rukutazopafadukananefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d09795-9a87-4b88-9743-2693deade5c2/data_structures_and_algorithms_in_java_best_book_quora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b0c3f3d-9591-448c-9abb-19d2b55bbfad/panonumagob.pdfIn PDF document text
    • http://jofesowevelen.epizy.com/car_engine_parts_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/koxojefiregisapuxoxogad.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/cctv_installation_training_manual_ppt.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_off0000eb95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB95 5028 bytes
SHA-256: c63be6fcdc4dc475d82f6e44081f649be1541ed211ea09062ebce7bd1d3f0677
font_01_sfnt_off0000fc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC96 10708 bytes
SHA-256: e273b1eec7ae6eda9d0a092cbbeffbb5a505e2d4e6ac7e3df3254583a96703cc

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