Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad828eb781a5d7e…

MALICIOUS

PDF

75.0 KB Created: 2021-03-30 14:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 613c57bc704a6d4fb7eb996cc104ec13 SHA-1: 4904341866d5d3cf103edeef3ffecb99d346e287 SHA-256: 4ad828eb781a5d7e8731f25ea847d459a86ad247961ef952513425324c5f9daa
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of this file. While no scripts were explicitly extracted, the presence of external URLs and the overall detection profile suggest this PDF is designed to lead the user to a malicious resource, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/award?keyword=also+sprach+zarathustra+piano+sheet+music+pdf PDF link annotation
    • http://strapslap.online/how_long_should_a_roomba_980_battery_lastfkaos.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwewiwudesi/hcraicE/slice_of_heaven_menu_wareham.pdfIn PDF document text
    • http://wulixiv.sportsontheweb.net/28592289758.pdfIn PDF document text
    • http://blacktea.space/citroen_c3_2012_owners_manualkehex.pdfIn PDF document text
    • https://cdn.sqhk.co/legusovej/ghbeiib/singing_bowl_set_afterpay.pdfIn PDF document text
    • http://myfoxing.online/kanadur9lqco.pdfIn PDF document text
    • http://persequenteamsohbet.com/identifying_polygons_worksheet_grade_4icmrh.pdfIn PDF document text
    • https://cdn.sqhk.co/remebusatoje/gicjdgO/sosovodalofuzopuri.pdfIn PDF document text
    • https://cdn.sqhk.co/lovaxixifew/OqLYghu/wovifedefisa.pdfIn PDF document text
    • https://cdn.sqhk.co/divojimo/tjjhGim/tower_defense_zone_hd_mod_apk.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/fajeloninesitel/daretokogabajunosona.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/95799880523.pdfIn PDF document text
    • http://jozilaro.atwebpages.com/syngenta_alika.pdfIn PDF document text
    • http://radisabuvaba.epizy.com/yaygn_olarak_kullanlan_bileikler_ve_formlleri.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/par_quoi_commencer_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/guitar_chord_arpeggios.pdfIn PDF document text
    • http://jilevatawew.epizy.com/danonuvibunadi.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/30074535008.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/tonajizan.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/bionator_appliance.pdfIn PDF document text
    • http://zudugib.epizy.com/gramtica_inglesa_larousse.pdfIn PDF document text
    • http://didoratanusej.rf.gd/missouri_boating_final_exam_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEB 5432 bytes
SHA-256: f012dadff3435de2c04c95f0ea93fb487bf536eca133f0138cac0d9d85439e00
font_01_sfnt_off0000e247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE247 10968 bytes
SHA-256: 41250ecb287aa2aba3252cdc2f1766c2c0fb34786689483bdbba4360f108915e
font_02_sfnt_off000106cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CB 16184 bytes
SHA-256: 59d1d26520e6cd1cf6dcc0ee873e992c324360c6fefec2768f5bd35b97b85629

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