Malicious PDF — malware analysis report

Static analysis result for SHA-256 5447dd75420d911c…

MALICIOUS

PDF

131.6 KB Created: 2021-02-15 04:22:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 890d2b0ee5176a7b1205e1fdca6e8917 SHA-1: a9de68da6c35e4f239ed5a4c4b035b62cb161899 SHA-256: 5447dd75420d911c1fda74792dc6ed58fe7871e681ceae81d476aa50d5cf95ab
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'maypoin.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains keywords related to 'dictionary app java', suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://maypoin.ru/wb?keyword=dictionary%20app%20java PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4428078/normal_5feb19270c72e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450048/normal_5fda0bb87180f.pdfIn PDF document text
    • http://bilkaita.space/flip_the_gun_hack_apk_2019cg82c.pdfIn PDF document text
    • http://eliyalte.com/free_printable_alphabet_worksheetswj068.pdfIn PDF document text
    • http://webmastervlad.ru/kelesinap6lka.pdfIn PDF document text
    • http://maximizator.space/voltage_drop_calculator_12v_planetc9nmj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498882/normal_5ff61b9768d0c.pdfIn PDF document text
    • http://hookup154.site/nitrogen_tribromide_intermolecular_fc5n9u.pdfIn PDF document text
    • http://my-favshopd.online/swedish_flag_emoji_androide6okb.pdfIn PDF document text
    • http://zoomita.fun/all_my_moviesqninb.pdfIn PDF document text
    • http://www.opentle.orgIn 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/sorapobuk/loxoxomojujuxetoguz.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/65476455994.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/missouri_river_fly_fishing_report_craig_montana.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/avanza_2013_hitam_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/alesis_qs8_keyboard_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/66568036152.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/nowosatawapusojefa.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/phonics_activities_for_preschoolers.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/payday_loans_show_credit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/android_developer_course_duration.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00015d98.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15D98 9812 bytes
SHA-256: b3240cb0612fe813f51a617854bd2be1e62b8e86d3ae2a896a377402cde0ebcb
font_00_sfnt_off00010e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8A 19060 bytes
SHA-256: 58681dc93cededda36f23f1363925edd40790e6e78a285912f26e57a7729b6f3
font_01_sfnt_off00014c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C9B 4952 bytes
SHA-256: f54eb4c8c57d7a9e95477bf5ac927a3f2544fb55d7fbd471a01fede7438995a1
font_03_sfnt_off00017987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17987 26388 bytes
SHA-256: 7d65bf22cd7e1d00d0afe6b9795fa9302f9aef0b1121692cb9bb426706b5b6fc
font_04_sfnt_off0001bf17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF17 25424 bytes
SHA-256: b3b737bf79503835b9fb4c8adfa6cb2c074057d71f8520644af26219418a8884
font_05_sfnt_off0001eac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EAC1 5800 bytes
SHA-256: 15e1b8ff3fd8bd5f49d7f549d46829a61d2ca3898607318ad858b680dc2d7c6f

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