Malicious PDF — malware analysis report

Static analysis result for SHA-256 557403b7769e2398…

MALICIOUS

PDF

77.5 KB Created: 2021-03-21 10:54:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54667490d32eb9f8050af843d7177dc8 SHA-1: 68978aa9ba82d68c8af0eb834bd52fcd1a637edc SHA-256: 557403b7769e239866dead7b913868c50bae29d117357713524672df738d23b6
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains keywords related to medication, suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mezovuduw.ru/123?utm_term=metformin+er+coming+out+in+stool
    • http://juwupexutaval.mywebcommunity.org/65836228906.pdf
    • http://tufezoba.22web.org/einstein_analytics_bindings_guide.pdf
    • https://gizafagubezuz.weebly.com/uploads/1/3/5/3/135321184/1a9b835723f3.pdf
    • https://sidatotivokusud.weebly.com/uploads/1/3/5/9/135959985/zedujixutapaj-kugakamekirajin-nadenegeforit.pdf
    • http://sebevifa.getenjoyment.net/pagetojukusadafugasejuz.pdf
    • https://dosoludu.weebly.com/uploads/1/3/0/8/130814101/dekadalukobor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/56d6a692-f4bb-4ae4-a3b9-7eb8e516806f/how_to_connect_canon_printer_to_wifi_g3411.pdf
    • https://uploads.strikinglycdn.com/files/b418a68d-1cc0-4e70-91cc-f4707085cfe0/31821718981.pdf
    • https://s3.amazonaws.com/gatazeromij/causal_mediation_analysis_example.pdf
    • http://luzawuwu.epizy.com/company_introduction_letter_format.pdf
    • https://s3.amazonaws.com/sojebelevenex/7652714334.pdf
    • https://uploads.strikinglycdn.com/files/6b792e74-dfc1-4cfb-90f0-67e37b1fd93f/kareravegubitiwawup.pdf
    • http://pasufok.rf.gd/vuvefewaxajiguwared.pdf
    • https://s3.amazonaws.com/wobuzisibal/wusavikixebefob.pdf
    • https://s3.amazonaws.com/dikobepibelun/beps_action_13_local_file_template.pdf
    • http://loruluze.epizy.com/tijeperitezirunosukazox.pdf
    • https://s3.amazonaws.com/jivuxo/86437711318.pdf
    • http://javixisapuv.epizy.com/peter_handke_veliki_pad.pdf
    • https://uploads.strikinglycdn.com/files/5d92f1b9-567f-4c52-a7e4-92e49a9b67b5/kerevekavasoz.pdf
    • https://s3.amazonaws.com/kugelilizibuwum/53381399945.pdf
    • http://xoxekojut.onlinewebshop.net/ms_access_2020_programming_tutorial.pdf
    • https://uploads.strikinglycdn.com/files/7ad49c57-8469-40fe-806a-9308bad242d1/17085196469.pdf
    • https://s3.amazonaws.com/fojaxexino/rulipinupizetiguterofe.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_off0000f0db.bin
775f482a66a505f329b6a87cfa860f848b8f8ae93475108889396773c22322f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DB 4996 bytes
font_01_sfnt_off000101da.bin
f270716248e66f432358522d49e7bac3749f4b37a35028a6162995bd26a35a9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101DA 11244 bytes

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