Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6d9353a4805715…

MALICIOUS

PDF

72.5 KB Created: 2021-02-01 17:02:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d51f74a77729774795bad493d0eb6a64 SHA-1: f0f07abcac5262e1aec3e3c57174107a32588b44 SHA-256: ea6d9353a4805715608e67886722e3bf24214da21fd36899a33257c8afefbc40
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URI that leads to a URL disguised as a Spanish learning resource, likely to trick the user into downloading a malicious payload. The document body is heavily obfuscated, but the presence of external URIs and the overall detection suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=learn+spanish+beginner+book+pdf PDF link annotation
    • https://cdn.sqhk.co/tezejikibus/hghche6/12844520486.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446035/normal_5feeb2715b43e.pdfIn PDF document text
    • http://idealica-official.website/sujewee63bm.pdfIn PDF document text
    • http://fbcopyright-center.com/burrito_bison_launcha_libre_change_characterc7qor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482190/normal_5fdf101dad722.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469145/normal_600806969a9ad.pdfIn PDF document text
    • http://serviceforyou.site/902127702291otnc.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/hd7Tgex/9145847644.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488339/normal_5ffa965106e2a.pdfIn PDF document text
    • https://cdn.sqhk.co/sufokorume/jhhfqv8/original_slingo_online_game.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/hbpjioT/voicemail_greetings_iphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422147/normal_6009929b6199e.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/dapekufoxiraku/bike_race_free_motorcycle_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/28001380872.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_off0000df5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5C 5416 bytes
SHA-256: 40a6fb07f5d12fa62e36974a1fa717c0f867e9adaa1e95c16af790b403b7a660
font_01_sfnt_off0000f1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C3 10436 bytes
SHA-256: 3adfb4a0b418d9fc0ad6a0add1424dba43dc497f57ea4ca2e299d8077d875d20