Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de851f08fb460aa…

MALICIOUS

PDF

73.9 KB Created: 2021-02-13 01:16:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b1e09d805fbb2be038b0bef184d54702 SHA-1: 6f2d85240b4faff7e5db6402476d3ff804342f7c SHA-256: 3de851f08fb460aa991cbefce502c6a231d77c676d2a30669ed29e5535ced9c5
96 Risk Score

Malware Insights

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

The file was flagged by a machine learning classifier and ClamAV as malicious, with ClamAV identifying it as a phishing trojan. An external URI pointing to 'bologen.ru' was extracted, suggesting a phishing or malware distribution attempt. The PDF structure and embedded URLs indicate a likely spearphishing attachment, aiming to redirect the user to a malicious site.

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://bologen.ru/wix?keyword=will+durant+books+amazon PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476133/normal_601a7eadc1981.pdfIn PDF document text
    • http://soribowunalosu.22web.org/40015663032.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419198/normal_5fefa400836cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374696/normal_5fcb8e5f77911.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473384/normal_5fef5f2d3aaa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_600dc94e91beb.pdfIn PDF document text
    • http://losewunisa.22web.org/nuranap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451756/normal_5febf7c775510.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374542/normal_5ff32800cd662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_601e93a66c31b.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/mukut/axis_ip_utility_software.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/ruronuletazoti.pdfIn PDF document text
    • http://josisuvo.epizy.com/jenagovapiwozewuromiwilus.pdfIn PDF document text
    • http://nelifofufotilep.epizy.com/64535645666.pdfIn PDF document text
    • http://dowisekek.rf.gd/mowakezuzejaviwop.pdfIn PDF document text
    • http://lerofisa.epizy.com/avatar_hd_android_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/new_odia_song_2018_video.pdfIn PDF document text
    • http://tosaxope.rf.gd/burp_proxy_certificate_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/lowest_common_multiple_worksheet_free.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_off0000e54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54F 5236 bytes
SHA-256: 37fd2ba49e348c589051568ed1c9007a2e82580bd53af81a149490daff6e4387
font_01_sfnt_off0000f717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF717 10516 bytes
SHA-256: c9a09f9f0657acb6b6d3aea1ebf857bd8180f015276b72aee7edc8e507beb2dc

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