Malicious PDF — malware analysis report

Static analysis result for SHA-256 2053bbeb5438278e…

MALICIOUS

PDF

74.7 KB Created: 2021-03-07 21:49:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d921ce7a48de0fc103905a0ad1964299 SHA-1: 78258fccbe2075b6c2adf8c5918e033e0e8f6d69 SHA-256: 2053bbeb5438278e5d36609c82d0a72b5293bac5ed771be5263b87e38c1530c3
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'ponafet.ru', which is likely used for phishing or to serve a malicious payload. The document body, though heavily obfuscated, suggests a lure related to 'Uh manoa transfer advisor'. No scripts were extracted, but the presence of external URIs and the overall malicious verdict strongly suggest an attempt to compromise the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ponafet.ru/wix?keyword=uh+manoa+transfer+advisor
    • http://lilakasidosusuw.iblogger.org/is_avon_skin_so_soft_bug_guard_safe_for_dogs.pdf
    • https://cdn-cms.f-static.net/uploads/4492600/normal_60308d9d6a891.pdf
    • http://tufofol.medianewsonline.com/josadi.pdf
    • https://cdn-cms.f-static.net/uploads/4483337/normal_601ee5d54a663.pdf
    • http://nitesufi.sportsontheweb.net/tempus_fugit_grandfather_clock_manual.pdf
    • https://static.s123-cdn-static.com/uploads/4466146/normal_5ff611117602a.pdf
    • http://demuxum.getenjoyment.net/verbos_en_ingles_presente_pasado_y_futuro_simple.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e95a51a3-dc19-4a6b-8426-9b637c3d4ddd/17317659983.pdf
    • http://suvalomimo.atwebpages.com/thetford_cassette_toilet_seal_lubricant.pdf
    • https://uploads.strikinglycdn.com/files/8dba5c2f-2eb7-4473-8fbf-86beb6ba02b1/how_many_volumes_in_attack_on_titan_manga.pdf
    • https://s3.amazonaws.com/wazotojemov/android_smart_phones_below_5000_mi.pdf
    • http://ziwebizivag.epizy.com/mxq_pro_android_tv_box_installation.pdf
    • https://uploads.strikinglycdn.com/files/e661f6ac-126e-4de1-821a-cb72b895e39a/asus_sabertooth_990fx_r2.0_atx_am3_motherboard.pdf
    • http://tufuripisaren.epizy.com/mixedadotebon.pdf
    • http://xuvaduw.epizy.com/encyclopdie_universalis.pdf
    • https://s3.amazonaws.com/toliwudalamem/47453318182.pdf
    • https://s3.amazonaws.com/jipowumat/joshua_tree_climbing_guide_book.pdf
    • https://uploads.strikinglycdn.com/files/e5122cd8-bcfd-4c36-b5d7-f692090db324/presidential_book_of_secrets_wiki.pdf
    • https://s3.amazonaws.com/lekelepowo/lewisville_jail_inmate_custody_report.pdf
    • https://uploads.strikinglycdn.com/files/210adaed-9ee5-4551-a3b1-93d88a710755/ipad_mini_hard_drive_replacement.pdf
    • https://uploads.strikinglycdn.com/files/e8fc7e27-652a-4d05-a9dc-d5f89bebfdf5/how_many_carbs_in_a_chicken_taco_salad_from_taco_bell.pdf
    • https://s3.amazonaws.com/tenunud/73168597645.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_off0000e6ee.bin
6c7f3eba67e2126be66faa3382ddb9d0a3bdb5b07ec695b0676d7eb32dd1ae01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EE 5168 bytes
font_01_sfnt_off0000f85a.bin
8729164b13a5e8e46f80a949316cfb8748f6fe24e84bff9ad9c14d85213a1ec6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF85A 10792 bytes

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