Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5a07a3b4138855…

MALICIOUS

PDF

78.0 KB Created: 2021-02-17 18:06:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: ec6fd7eacea01df66350f97e7e1b6a88 SHA-1: dbf3c24773bb5fc565fbf46d0ec8696f863ee557 SHA-256: 0f5a07a3b41388553fbddb2466fc70aba88dec7537c6d3ae14923e8b96bc3da0
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, disguised as a search result for programming tutorials. This suggests a phishing or social engineering attack aimed at tricking users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://leonvi.ru/strik?utm_term=visual+basic+tutorials+for+beginners PDF link annotation
    • https://cdn.sqhk.co/segenapiza/jjgoGIA/15041169522.pdfIn PDF document text
    • http://appeal-ig.com/xenotuzafesidovi3my5s.pdfIn PDF document text
    • https://cdn.sqhk.co/dugixikisim/Nd1hbja/univision_noticias_hoy_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/GibBUvF/printable_clue_game_sheets.pdfIn PDF document text
    • http://oneitstore.pro/fudulexenam58fx.pdfIn PDF document text
    • http://pixelbarista.com/lowes_return_policy_without_receiptww9sx.pdfIn PDF document text
    • http://suniduno.iblogger.org/boxer_rebellion_chinese_uniforms.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/igd0Xhh/trending_videos_on_facebook_2018.pdfIn PDF document text
    • http://nagonakog.22web.org/printable_adjective_worksheets_6th_grade.pdfIn PDF document text
    • http://deemonatrafik.xyz/gafatuzujoxofatexm1ry.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/uicjdii/birifiragovopikepakosiloj.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/selivuvumepaveb/loniwafavunoxivila.pdfIn PDF document text
    • http://welemup.rf.gd/aubrey_qwana_uhamba_nobani_song.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/52397881975.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/descargar_cymera_apk_para_android.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/pathfinder_kingmaker_early_game_guide.pdfIn PDF document text
    • http://jazupizewatabal.epizy.com/microsoft_klondike_solitaire_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/55824125630.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/17300272494.pdfIn PDF document text
    • http://kovemipenege.rf.gd/bimujebuwegezomivajege.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_off0000f3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C2 5156 bytes
SHA-256: 35459c6041e4c23f1c829b5341db0d1c4566486df4109fe409b67facf1b4e0f9
font_01_sfnt_off0001055e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055E 11052 bytes
SHA-256: 6da6edbbe4d8126785d751e5a9245b5137070685b21ddfe10de88a0b4e0323cc

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