Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17153178ae88208…

MALICIOUS

PDF

81.7 KB Created: 2021-03-25 12:44:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9b057ade427264709b478dd8ffabbbc SHA-1: 32db076f9db6fa6fc11f28422dea452e0ccda1c6 SHA-256: b17153178ae8820879f204b990f57b76d3c93276d7bee2fa1262702ff2fb18c3
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, with a high risk score. It contains an embedded URL that leads to a suspicious domain, likely intended to deliver a phishing or malware payload. The document body, though heavily obfuscated, suggests a lure related to income tax returns.

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://jumiwimov.ru/wix?keyword=what+is+it-201+income+tax+return
    • https://cdn-cms.f-static.net/uploads/4365567/normal_6057977acdcc0.pdf
    • http://bijipejip.iblogger.org/tamil_2019_movies_in_tamilrockers_mp4.pdf
    • https://cdn-cms.f-static.net/uploads/4385437/normal_60218c46683d6.pdf
    • http://fisoxovazesenam.iblogger.org/exercicios_analise_combinatoria_com_gabarito.pdf
    • https://cdn-cms.f-static.net/uploads/4403937/normal_603462ae77c35.pdf
    • https://cdn-cms.f-static.net/uploads/4408881/normal_6043e01161075.pdf
    • https://static.s123-cdn-static.com/uploads/4389792/normal_5feee240b810d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f8b79710-eea5-4d5d-ad74-37f545a02e52/why_is_my_wine_cooler_not_cold.pdf
    • https://uploads.strikinglycdn.com/files/da9d1750-9ed9-4b1f-9a05-a48a512a0298/what_is_the_plot_twist_in_13_reasons_why.pdf
    • https://uploads.strikinglycdn.com/files/879af19e-2a85-4986-a713-1b7d256f55e1/stop_strategy_for_writing.pdf
    • https://uploads.strikinglycdn.com/files/4992e7aa-70a5-4ce2-ba5c-5a6cac3321cc/jipiramuwidisaboruma.pdf
    • https://uploads.strikinglycdn.com/files/472ca338-1cfa-40a8-947e-51839c175f33/zejawuwusubad.pdf
    • https://uploads.strikinglycdn.com/files/42b29775-ea1e-4976-89e0-779ac530e3e9/61636649158.pdf
    • https://uploads.strikinglycdn.com/files/9f810e59-0867-4f41-bcdb-70793afbc81d/how_to_jailbreak_apple_tv_a1469.pdf
    • https://uploads.strikinglycdn.com/files/e654d50b-604c-4458-a333-e3afcf9b2ba8/how_much_for_a_2jz_swap.pdf
    • https://uploads.strikinglycdn.com/files/e5444bcc-e491-43a6-ad48-6214157e049b/gonewabokobugexumene.pdf
    • https://uploads.strikinglycdn.com/files/00475c94-a13a-435e-bce1-258866674073/dituwobepe.pdf
    • http://panobamufa.epizy.com/awesome_band_fun_time_mp3_download.pdf
    • https://uploads.strikinglycdn.com/files/0eaad627-0dd3-4e14-ba33-b203331a87f5/why_does_my_mouth_taste_like_hydrogen_peroxide.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_off00010307.bin
8f8aeb2a7b1da6623a7b4f981a92f2154b20ca3e3edd0cb5ef315090444413ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10307 5444 bytes
font_01_sfnt_off0001157c.bin
58ac7979f399738f6cb896149b924ea16587bf310fd161fa241dfd8639bb0e5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1157C 10404 bytes

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