Malicious PDF — malware analysis report

Static analysis result for SHA-256 41e8b704c04fc978…

MALICIOUS

PDF

76.1 KB Created: 2021-01-30 14:49:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 756db965246ac476728804cfd46bbeeb SHA-1: 7a4f1f588d82f77c240da8a95d2d32c573fcc07f SHA-256: 41e8b704c04fc9783d6a2ea24dbeba9bf289b4c7d750ca0479b7eeb00ce47a9b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 a machine learning classifier. It contains an embedded URI pointing to 'https://jottigo.ru/123?utm_term=old+fashioned+radio', which is likely a malicious domain used for phishing or to host further malicious content. The PDF structure itself does not contain executable scripts, but the presence of the malicious URI and the high confidence detection indicate a phishing or malware distribution attempt.

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://jottigo.ru/123?utm_term=old+fashioned+radio PDF link annotation
    • https://cdn.sqhk.co/zubavagi/nOigji0/commander_genius_retropie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474192/normal_6004415f6c880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405459/normal_5fd3977764757.pdfIn PDF document text
    • https://cdn.sqhk.co/pejemomet/iihgdic/didi_and_friends_bingo_chord.pdfIn PDF document text
    • http://center-about.com/vejirazesejud66aq.pdfIn PDF document text
    • https://cdn.sqhk.co/bovuzane/hifQaNC/67193576187.pdfIn PDF document text
    • http://podeves.xyz/50211600255zpg40.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/ghvhgjc/eagle_sound_notification_tone_download.pdfIn PDF document text
    • http://futup.ru/483342128182ubx.pdfIn PDF document text
    • http://blue-tick-central.com/67102757211yvo79.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/fIMghWH/modern_warfare_update_notes_1._06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zinizebaki.epizy.com/90483181756.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/gavibozigepajupirofu.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/can_t_stop_the_feeling_official_video.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/setivepup.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/sony_android_tv_built_in_chromecast.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/association_of_former_students_twitter.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/17361181512.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_off0000ee79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE79 5020 bytes
SHA-256: c2a3d3e00738bacc39903202fc6e6dd722d006353bdaf9fda407ddf29eb23978
font_01_sfnt_off0000ff82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF82 10452 bytes
SHA-256: e13731af273841a28544c90e0cc0202201f5856f9e061c8babb78a926c7df01c

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