Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b639ccc75ff810…

MALICIOUS

PDF

88.0 KB Created: 2021-01-23 17:00:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6a1ad9ab9af19b7daf7ce728aa44b013 SHA-1: 1e23c5325e128222feb74747fdd7332dd385b9f4 SHA-256: b8b639ccc75ff810caf073bd334faab43828b0a0d553dd6fed800a80d7ea40c6
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URL that likely leads to a malicious download. The presence of a visual download button heuristic further supports the phishing lure attack pattern. No scripts were extracted, but the overall structure and heuristics indicate a malicious intent to trick the user into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pete%2527+s+dragon+full+movie++480p PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4527345/normal_5fee7f3e55b21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408582/normal_5fc6481e469ee.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/gjbIjdo/32386147302.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/bggJEXX/44718872159.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/ghzGyN7/78116567906.pdfIn PDF document text
    • https://cdn.sqhk.co/kowalaxu/e8uijgj/risk_analysis_methods.pdfIn PDF document text
    • https://site-1176202.mozfiles.com/files/1176202/39337507043.pdfIn PDF document text
    • https://cdn.sqhk.co/fapewejav/aiiijbG/free_fire_ringtone_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/totudavomud/eieicje/8465850936.pdfIn PDF document text
    • https://site-1205776.mozfiles.com/files/1205776/cops_and_robbers_minecraft_bedrock_map.pdfIn PDF document text
    • https://cdn.sqhk.co/niwonosorude/idm9zig/baltimore_city_arrest_warrant_search.pdfIn PDF document text
    • https://cdn.sqhk.co/mumaxifup/1ieigkD/48477257269.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/23725273461.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/vintage_anchor_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/umlaut_characters_android.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/avery_shipping_labels_template_5524.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD030 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0000e117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE117 5880 bytes
SHA-256: 450b6b329069dfd242449347d5b55db8c444cc87513b8c59bcf1d5e85497e3ae
font_02_sfnt_off0000f51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51D 20968 bytes
SHA-256: 87985804ebf98b1030980f20b4e39595e1aa76caccafc3e7d64f2ca02509db1c
font_03_sfnt_off0001154e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154E 2276 bytes
SHA-256: 5e0676e134781f2a21c06a0d045eebc95ad2f72f5ed7fc876ffdcead7ccbe471
font_04_sfnt_off00011f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F10 1888 bytes
SHA-256: 5486c1bd0abeaa92abd36d1bee4e961ffa0c4a35e07252aef31d76b6fa745a29
font_05_sfnt_off00012845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12845 12592 bytes
SHA-256: 280055f0fe301c99b1ee9042e6117aad64405a73e8e8fbcccd946fda8535f6af

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