Malicious PDF — malware analysis report

Static analysis result for SHA-256 42c834ab624b0e81…

MALICIOUS

PDF

78.9 KB Created: 2021-03-24 18:05:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bcf8e1335270d456a90846647ac4b6db SHA-1: c941bc44cecf855516f02085d07fecbc81115267 SHA-256: 42c834ab624b0e8124a13a73b936b46b2ba7077a08a8d2801d4b4d769b876599
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains an embedded URI pointing to a suspicious domain, 'jumiwimov.ru', which is likely used to host a malicious payload or phishing content. No scripts were extracted, but the presence of the external URI and the detection names strongly suggest a phishing or malware distribution attempt.

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/strik?utm_term=my+side+of+the+mountain+movies PDF link annotation
    • http://lajenasuwo.iblogger.org/toxafuwew.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxofidipo/dVejgQc/sirofolafazej.pdfIn PDF document text
    • http://gezowipefu.22web.org/how_to_type_alphabet_in_iphone_6_keypad.pdfIn PDF document text
    • https://turetufifej.weebly.com/uploads/1/3/4/5/134500159/mufotizufapoxixufe.pdfIn PDF document text
    • https://cdn.sqhk.co/gutemokerezo/hdjgCgf/braiding_hair_salon_brooklyn.pdfIn PDF document text
    • https://tabajojimito.weebly.com/uploads/1/3/4/3/134317549/lowedejafup-lanevomerir-sogeziw-wulonatukov.pdfIn PDF document text
    • http://duxaromovaxizom.iblogger.org/24422985201.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/byDUibY/regadugenesu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sefabe/soft_white_led_c9_christmas_lights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/836faaca-e80c-42ad-933b-71eda2c09dc7/51601453858.pdfIn PDF document text
    • http://voralozavudiwa.epizy.com/suffix_worksheets_2nd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/94773481278.pdfIn PDF document text
    • http://lovafis.rf.gd/dolisekotilezutugurilu.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/board_game_design_theory_books.pdfIn PDF document text
    • http://repalisakafi.epizy.com/50156496273.pdfIn PDF document text
    • http://fakodesugi.epizy.com/pusux.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/how_to_reset_samsung_s6_wont_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dcec133-4b4b-46d7-9941-8f75a5e06702/how_to_describe_trees_without_leaves.pdfIn PDF document text
    • http://suvowafavij.epizy.com/white_tiger_masked_singer_first_performance.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_off0000e96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96A 5068 bytes
SHA-256: 99f3356806802a0866f14b91e7ac7211da1366cd6513913ca67f9b4eaf534e45
font_01_sfnt_off0000fa8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8E 11020 bytes
SHA-256: 933425ffa7f86cd867255aa0cf9b5e39ed8d6bcd3a5c48cbd2b02dc5c1157246
font_02_sfnt_off0001204b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1204B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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