Malicious PDF — malware analysis report

Static analysis result for SHA-256 44b85690fcf20055…

MALICIOUS

PDF

90.5 KB Created: 2021-02-12 07:19:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: ebcd1e808604aed5a6ef0552e1ffe053 SHA-1: bd4612d6988144fdd9905260748ef3c01493b151 SHA-256: 44b85690fcf2005561f08ebd7b8d56812c56898128bf3ab76cb7f601cf14ab7b
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of the external URI is a primary indicator of the attack pattern.

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://jacksth.ru/123?utm_term=estudio+de+capacidad+instalada+ips PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369626/normal_5ff1b4dca631b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394072/normal_5fff750bbf17c.pdfIn PDF document text
    • https://zifofuxe.weebly.com/uploads/1/3/5/3/135386801/3888518.pdfIn PDF document text
    • https://wetugaremuzen.weebly.com/uploads/1/3/5/2/135298520/0447c.pdfIn PDF document text
    • http://vibigalobonewil.iblogger.org/25605347838.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379380/normal_5fe4336495105.pdfIn PDF document text
    • http://50off.pro/reversible_octopus_tiktoknl8l5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472753/normal_5fde1151ef41b.pdfIn PDF document text
    • https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/8913865.pdfIn PDF document text
    • http://bumaga.bz/tcs_previous_email_writing_questions_with_answerscr5cw.pdfIn PDF document text
    • https://banatili.weebly.com/uploads/1/3/5/3/135314160/97665e0b7.pdfIn PDF document text
    • http://disconto50.info/kannada_new_movies_in_tamilrockersrlsud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5fe8eef19d346.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wunipowozat.rf.gd/vefazebufedubi.pdfIn PDF document text
    • http://tivanebizogosa.rf.gd/vesugurasoxukofamijar.pdfIn PDF document text
    • http://sisigetevi.rf.gd/beauty_camera_photo_editor_apkpure.pdfIn PDF document text
    • http://vajekalisafemun.rf.gd/afadhali_yesu_audio.pdfIn PDF document text
    • http://koxowasone.epizy.com/honda_pilot_2009_manual.pdfIn PDF document text
    • http://budezeja.rf.gd/59914790723.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_off000120d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D4 4928 bytes
SHA-256: ce0fa06f276c9ffd7ea55682aca4bd54ca68a0b9c4bdeaf591f90934e381cfa1
font_01_sfnt_off000131af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AF 12780 bytes
SHA-256: 5e844131404cadf22c4fd067c43405da372374671605613cebd3e946006a717d

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