Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc281148fe14c970…

MALICIOUS

PDF

179.1 KB Created: 2021-02-23 17:02:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9a55a33179ed6e4d2865e7223724a080 SHA-1: 7fbaa00ae80f3d97e95eb25909842f16cb08ab63 SHA-256: fc281148fe14c97060f6fe78ead2ef1136a58ae0f96fb9c5454534fe35e28662
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of the external URI suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://jottigo.ru/wix?keyword=cell+%2528dragon+ball%2529+height PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486751/normal_5fd2771d990ab.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/HthgX7L/cube_maze_quiz.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/niihhjj/miziwesapuladevigemiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391327/normal_5ff270864bbc6.pdfIn PDF document text
    • http://italywow.pro/rumuwimirokugifiritozopwkc2p.pdfIn PDF document text
    • https://cdn.sqhk.co/pejinijew/eghggji/12659105599.pdfIn PDF document text
    • https://cdn.sqhk.co/kamugututu/egdkxib/rogawuxakawukizuzep.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/cRp11Lt/mt_carmel_umc_preschool.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/jDihifB/injustice_2_legendary_edition_price.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480889/normal_5fd11a25cfdcb.pdfIn PDF document text
    • http://mxbur.fun/paycell_nedir_mobil_odemeg3jht.pdfIn PDF document text
    • http://hallop.xyz/16921166499rtzn3.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/78jbBjd/is_the_cw_app_really_free.pdfIn PDF document text
    • https://cdn.sqhk.co/legezuseg/sgihcge/factory_inc_cheats.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/kofabube/semozurumonogejugalabese.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/5415681464.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/jurnal_skripsi_akuntansi_perpajakan.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/3726752807.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/similarity_and_congruence_gcse_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/paxivosurubum.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26241 6228 bytes
SHA-256: 8507a1d91293fe8f2d5007d45ce6677080ebf94aed6c6e1e66d7944f911ac8cc
font_01_sfnt_off0002777b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2777B 5012 bytes
SHA-256: 6d28f99662eb6d199a91658325e5c1bd445f4f5c7d372f661322b51723e875a5
font_02_sfnt_off00028880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28880 10956 bytes
SHA-256: fa4aa0cb336540d9880f7b274e77a9209d1313c41e4faa60c97422a481f5a934
font_03_sfnt_off0002ad93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD93 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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