Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5171e55be549c64…

MALICIOUS

PDF

82.4 KB Created: 2021-02-03 04:00:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a18da7c191032319d45b212459fa379c SHA-1: 2dd31f2bbf89d6b7beda5d050ff5adfb831c7ded SHA-256: c5171e55be549c6455178fa514dfaad965318521887b9060ce4d804aa3dde2bc
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/123?utm_term=different+types+of+drumsticks+and+their+uses PDF link annotation
    • http://dulexip.22web.org/medivagaru.pdfIn PDF document text
    • http://zedukibawubige.22web.org/muwuvixafoli.pdfIn PDF document text
    • https://cdn.sqhk.co/madilaxetevo/ayQPeJp/car_won_t_start_shifter_stuck.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/amh10DJ/72808015542.pdfIn PDF document text
    • https://cdn.sqhk.co/wemerofada/eDhciaW/80352024112.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/sojenozap/boat_loading_guides.pdfIn PDF document text
    • http://vaxuraribo.rf.gd/mozagenobusijarufugiduvib.pdfIn PDF document text
    • http://gukedam.rf.gd/magic_escape_level_5_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/piece_of_cake_6e_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/wixivor.pdfIn PDF document text
    • http://dexifuv.epizy.com/javobiv.pdfIn PDF document text
    • http://ribuxuvotamu.rf.gd/apls_fluid_resuscitation_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/messenger_android_4._2._2.pdfIn PDF document text
    • http://fixadamobus.epizy.com/sweater_design_in_plain_english_free.pdfIn PDF document text
    • http://dudibagigop.rf.gd/little_big_planet_3_trophy_guide_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/17972981574.pdfIn PDF document text
    • http://woxebolinos.rf.gd/ritosurukilikuzevegali.pdfIn PDF document text
    • http://fonaxipovun.epizy.com/96955269830.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/washout_folly_beach_surf_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/82986671344.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_off0001054c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054C 5528 bytes
SHA-256: bd8302812aa739cddee6cb8fe648d07600642c58062ad2462b4187227716c25d
font_01_sfnt_off00011805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11805 10504 bytes
SHA-256: 9ac9aef541d7ad5c60d087901158677d41e9640a2c676fe85d4b1f3921bcce26

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