Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97ebdbc34bac38e…

MALICIOUS

PDF

79.8 KB Created: 2021-05-08 12:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cff32d43af84a9d55ba10f7e24974e7 SHA-1: a3c57a73bf9f360bb3b685056285210a9be05817 SHA-256: e97ebdbc34bac38e677f5750c35a395fec9f5b8e6ac0db61cf0042ffafc14606
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers. It contains an embedded URL pointing to 'https://jacksth.ru/strik?utm_term=are+prayer+beads+missable+sekiro', which is likely part of a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/strik?utm_term=are+prayer+beads+missable+sekiro
    • http://xivagoz.22web.org/56848582090.pdf
    • http://tubunasozejut.22web.org/barefoot_investor_2020_download.pdf
    • http://nubuweso.iblogger.org/vodutuw.pdf
    • http://jefofonem.iblogger.org/dodap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/xakajoziwibi/64637195765.pdf
    • https://s3.amazonaws.com/lixuduwonifa/1st_grade_math_word_problems_worksheets_free.pdf
    • http://fogaripopuna.rf.gd/weight_loss_diet_plan_in_marathi.pdf
    • http://xaxefoz.epizy.com/51387174802.pdf
    • https://s3.amazonaws.com/xumakomowi/59772101000.pdf
    • http://komeraja.epizy.com/51969767136.pdf
    • http://kitawijarital.epizy.com/ashirvad_column_pipes_price_list_2020.pdf
    • https://s3.amazonaws.com/woneketelak/dafajobozatusuwo.pdf
    • http://dimebuturerab.epizy.com/nagafogolero.pdf
    • https://s3.amazonaws.com/garorowa/80354483889.pdf
    • https://uploads.strikinglycdn.com/files/ac489bd5-490c-424b-b687-51f804010f57/algorithms_illuminated_part_3_download.pdf
    • https://s3.amazonaws.com/jemazejodep/polarized_3d_video_player_for_android.pdf
    • http://jaxirelogalitis.epizy.com/bessa_r3m_manual.pdf
    • https://uploads.strikinglycdn.com/files/fec2bac6-cdf0-41ee-98dd-6302511880ec/lotezotago.pdf
    • https://s3.amazonaws.com/zodererezuzuxi/refotosegituj.pdf
    • http://guvetevuvov.epizy.com/how_to_scan_with_brother_mfc-7860dw.pdf
    • https://s3.amazonaws.com/gogunabones/photolithography_process.pdf
    • https://uploads.strikinglycdn.com/files/9fb6e35a-eb2a-4362-9e4c-150d0cff278a/black_and_decker_dustbuster_14.4_v.pdf
    • http://xofokarige.rf.gd/skype_for_business_2016_mac.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec0e.bin
54072687b4e38b0e2629b48f65e05baf5dbf313c032500c5794400e692279fda		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0E 5004 bytes
font_01_sfnt_off0000fd03.bin
d1c88f64dc423c1a3a26cfca56f0db819afd68dd5e97c943578b9633cad33b3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD03 11440 bytes
font_02_sfnt_off00012340.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12340 4324 bytes

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