Malicious PDF — malware analysis report

Static analysis result for SHA-256 aacda0d36ac39e00…

MALICIOUS

PDF

74.8 KB Created: 2021-03-03 05:00:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b308b7e89085ab19f722dcf7cce07004 SHA-1: d360696fddc846966aa680f849f6a96870047cc8 SHA-256: aacda0d36ac39e00819d012eb21d9f9824512bfadd2ef419a59b61f553126cd2
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, specifically 'https://soxebez.ru/strik?utm_term=windows+10+office+won%2527t+open'. The document body, though heavily obfuscated, suggests a lure related to Windows 10 Office issues. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/strik?utm_term=windows+10+office+won%2527t+open PDF link annotation
    • https://cdn.sqhk.co/padasagam/6hf3gd9/tap_tap_dash_apk_ios.pdfIn PDF document text
    • http://redtea.space/crime_scene_notes_exampledufyt.pdfIn PDF document text
    • http://gomigapujasep.sportsontheweb.net/5416211841.pdfIn PDF document text
    • https://cdn.sqhk.co/xaduwudixum/kjfXBif/xukofajakaxukuvokid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506131/normal_603ed5f01de1f.pdfIn PDF document text
    • http://graatorama.space/how_do_you_measure_a_stihl_bart6klb.pdfIn PDF document text
    • http://qrettalq.online/davemumnhk2.pdfIn PDF document text
    • https://gugagefa.weebly.com/uploads/1/3/4/3/134343265/suzujelinomonojesilu.pdfIn PDF document text
    • http://podeves.xyz/what_is_pharmacology_in_nursing_school497iy.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/hfhajbk/25961965884.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/q9.what_is_the_essential_condition_for_the_addition_of_two_vectors.pdfIn PDF document text
    • https://cdn.sqhk.co/jujadiziga/icXhggh/93803148304.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386091/normal_60261da13a7cf.pdfIn PDF document text
    • http://doweryklkq.space/invertebrate_zoology_book_freehfht1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/bojafufakazewumiku.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/nururogirotu.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/az_movies_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/barron_reading_test_3_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/kurinipiwosamuzoxodexani.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74C 5144 bytes
SHA-256: 26f61305a14ec9ab80f9b2ab0fb654a1ad1a3cda19a821b620ab15b673a58624
font_01_sfnt_off0000f915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF915 10788 bytes
SHA-256: 208c68bd0b828beec5b39ddf4391dbea25f5bc1eaf297e628611f4ee4108653e

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