Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba972b4f2bfd7ac…

MALICIOUS

PDF

72.0 KB Created: 2021-03-16 19:26:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa7d64a76d249d4978a7906ed4f37a52 SHA-1: 1096cb776f4234e3b8c395a9ca75c7dedde79d86 SHA-256: fba972b4f2bfd7aced4af77d0f1c847d457ae0f8e18ea0e768df2d273101fb4c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. No scripts were extracted, but the presence of the malicious URL strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/123?utm_term=afnor+formation+irca
    • https://static.s123-cdn-static.com/uploads/4447903/normal_5ffa0a02c2489.pdf
    • http://canlisohbetim.net/14971834303cebn2.pdf
    • http://faceit.su/801976262750y06h.pdf
    • https://static.s123-cdn-static.com/uploads/4464710/normal_5ffb379a91d27.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vapelurowar/neonatal_pneumonia_treatment_guidelines.pdf
    • https://s3.amazonaws.com/pulujolatepuv/dell_2007fp_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/a0e8d16c-391f-4b1e-abaa-9d8c8f6d2295/xekoriru.pdf
    • https://uploads.strikinglycdn.com/files/432b1c05-0bc2-4f59-9906-55974754047a/what_order_should_i_watch_the_marvel_movie.pdf
    • https://s3.amazonaws.com/neporezofov/3697888530.pdf
    • https://s3.amazonaws.com/pegebunov/best_oil_filled_radiator_uk_reviews.pdf
    • https://uploads.strikinglycdn.com/files/663052b6-1b61-4845-b8bd-d74086f79953/rainsoft_water_filter_parts.pdf
    • https://uploads.strikinglycdn.com/files/b4c1247b-77f2-4818-bfc0-beaea5319c78/nadegajebeveputaxumawuku.pdf
    • https://s3.amazonaws.com/natewared/happy_new_year_2019_song_tamil.pdf
    • https://uploads.strikinglycdn.com/files/03b75721-6fc4-4b26-96a0-428eba927b67/restaurant_general_manager_salary_singapore.pdf
    • https://uploads.strikinglycdn.com/files/74b77567-773b-4e6f-ac50-b304cd9ce791/common_english_study_bible_online.pdf
    • https://uploads.strikinglycdn.com/files/becd26a9-e6d0-4d01-b323-228952ea0545/54593282824.pdf
    • https://uploads.strikinglycdn.com/files/f7404190-177a-4584-9a7e-dea469401fbd/17153760507.pdf
    • https://uploads.strikinglycdn.com/files/1bbae6ad-5b86-40d3-a0db-0ab5208bde72/janenilajiterenajimusud.pdf
    • https://uploads.strikinglycdn.com/files/5e18880e-9ec6-48e8-bff2-409f85750d98/fix_my_jbl_flip_3_charging_port.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbfe.bin
377557387e418845f28f136cc73c173cecd783f4a61bb9649b9e43f5385513c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFE 4804 bytes
font_01_sfnt_off0000ec3d.bin
af6767adf8c91791425ef1eecd2da331c9f418ac1ed39a231fd790da5a0df125		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3D 13008 bytes

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