Malicious PDF — malware analysis report

Static analysis result for SHA-256 2699919d41ad9f8e…

MALICIOUS

PDF

83.7 KB Created: 2021-04-01 09:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: abf427b57ac6d3279e1779e9b2dc05b1 SHA-1: ed3688bc6cbfbdd89f647b70ac197704b2c35333 SHA-256: 2699919d41ad9f8e6897ac28f03905939b1dacf98eb72af845517b7206c02dbd
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 a machine learning classifier indicated a high probability of maliciousness. An external URI pointing to 'jumiwimov.ru' was extracted, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'Amravati mandal paper pdf' and the authoring application 'wkhtmltopdf', which could be part of a lure.

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://jumiwimov.ru/award?keyword=amravati+mandal+paper+pdf PDF link annotation
    • https://cdn.sqhk.co/zururodi/dxzhjie/85369224944.pdfIn PDF document text
    • https://cdn.sqhk.co/ritafase/dif9hga/17759893177.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/KIhhShh/64487739353.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/NQDhj90/muvimadevizemojuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/kotidox/application_form_for_minor_passport.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/feliwinukivijawoz.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/android_9_message_center_number.pdfIn PDF document text
    • http://vewawisu.onlinewebshop.net/75263083459.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/mobogenie_app_new_version.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/pegegeribinuraleradosuva.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/98066748181.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/tagulekivoperemuw.pdfIn PDF document text
    • http://kuxubakelixuzot.atwebpages.com/on_rhetoric_aristotle.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/25625393219.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/alaipayuthey_flute_bgm_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/vavabizubadowefutuzetogew.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/44258633931.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DF 5060 bytes
SHA-256: 6d3b2dac495f22b8d192ebe0910416624dd63ad8b63c0548973eb370dd1d4d50
font_01_sfnt_off0000f504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF504 10748 bytes
SHA-256: fb1f07ef85f03bf28326679d1937f786eb5cceaf7b54f1d1d778d10c6c10870b
font_02_sfnt_off00011923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11923 13364 bytes
SHA-256: 0e5e8ac5de018c62d84caf95ab89ae3385b14aceb26a048bd2c24d45066b1ff2

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