Malicious PDF — malware analysis report

Static analysis result for SHA-256 44b2703095813d49…

MALICIOUS

PDF

77.0 KB Created: 2021-03-06 14:24:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c41f27db116900b2f13bacd6eb136827 SHA-1: f9a0fd7ec1902607351b02af29c3318652e657a2 SHA-256: 44b2703095813d496994a575b040fc080bc1ea741cd458ac05ddb6a2572b20a1
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by heuristics as an external URI. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be a lure related to song lyrics, directing the user to a suspicious domain. This suggests a phishing or malware delivery attempt.

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://jacksth.ru/award?keyword=jiminy+cricket+song+when+you+wish+upon+a+star+lyrics PDF link annotation
    • http://dutarotanazosuv.medianewsonline.com/is_the_green_mile_a_short_story.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458417/normal_5fdb71597ae88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481285/normal_603b5eb0d313c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424951/normal_600695ed17cda.pdfIn PDF document text
    • http://fajasated.mywebcommunity.org/zanifepofexidododowuvum.pdfIn PDF document text
    • http://gukiduwonaxinef.getenjoyment.net/2013_dodge_charger_rt_for_sale_in_texas.pdfIn PDF document text
    • http://gaximivotekole.mypressonline.com/rinnai_e110cn_parts_list.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/denokuvizarejonisorenomov.pdfIn PDF document text
    • http://boxijogirexu.medianewsonline.com/93290682844.pdfIn PDF document text
    • http://setopin.mypressonline.com/que_es_un_lder_definicion_para_nios.pdfIn PDF document text
    • http://kakorixow.mygamesonline.org/1492221462.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/gekojulog/inej_ghafa_six_of_crows_fanart.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/happy_birthday_song_for_husband_video.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/data_structures_for_coding_interviews_in_python.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/rebatosorupusatar.pdfIn PDF document text
    • http://zipemoluligera.myartsonline.com/39582366135.pdfIn PDF document text
    • http://rizivubonulej.atwebpages.com/driver_blacks_law_dictionary.pdfIn PDF document text
    • http://senesijosezetu.myartsonline.com/97534843523.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_off0000efb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB5 5596 bytes
SHA-256: 124b07d7308c43ea5f09e33b217fb8f1f11af986d27026070cb05e1d2b640627
font_01_sfnt_off000102ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AD 10360 bytes
SHA-256: d389ef5079149af7c41a65da7a8e950fbf8eccbf672a0ec40fe61f80270a3e64

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