Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec231bc9f7a9370…

MALICIOUS

PDF

74.7 KB Created: 2021-02-01 07:32:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 00e8ca7f2ce3c68d37253f328c88fdfc SHA-1: c6290b0bb86ee368fbc53ab7fbb4369d95b7911e SHA-256: aec231bc9f7a937044788341b5cae2eabf2ed27029af3bcd632a598577b2418c
136 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL, identified by ClamAV as Pdf.Phishing.Trojan. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. The embedded URL points to a domain that is likely part of the attack infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://maypoin.ru/aws?utm_term=on+my+way+music+ringtone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409998/normal_5fd120d245f89.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/jdgfdwV/linkin_park_amazing_wallpaper_phone.pdfIn PDF document text
    • http://tiruxukanemaga.iblogger.org/ansys_fluent_18_tutorial_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496014/normal_5fc84240565ef.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxinugad/JeggjeU/blood_pressure_in_paediatric_age_group.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369315/normal_600985b39ec2b.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwokosokif/iaLKkJU/gijixolikoke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371799/normal_60039dd0d8fba.pdfIn PDF document text
    • http://fusubakitakudup.66ghz.com/wamefilinalepofot.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/c4jcieM/tamil_news_channel_ringtone_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486374/normal_60053e1ae9a0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_6009f60d5bac0.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/wutogugej/radapizalid.pdfIn PDF document text
    • http://kevikawimal.epizy.com/belmont_report_ethical_principles.pdfIn PDF document text
    • http://povalimokuwov.rf.gd/dreamweaver_for_ubuntu_14._04.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/animated_3d_live_wallpaper_free.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/ipcc_fifth_assessment_report_ar5.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/prenuptial_agreement_sample_form_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/math_brain_teasers_middle_school.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_off0000e67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67C 5308 bytes
SHA-256: b20832282e5b8cf921403131cdf71eafd831e59ede0e00e1f2a31b413bd4d016
font_01_sfnt_off0000f889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF889 10776 bytes
SHA-256: 04a4f415c2708a039fbe9192d582d8a3c0930f811ee0c4c9a567225c8499f0c9

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