Malicious PDF — malware analysis report

Static analysis result for SHA-256 e818f9aae09e6c7f…

MALICIOUS

PDF

81.2 KB Created: 2021-02-23 04:57:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0d7efe179e6077592e7bc53321d11e8b SHA-1: c42b1bb7d73fb38ddb2813bca939dff5b73e7a73 SHA-256: e818f9aae09e6c7f7c1ee75d0dfe97c5b618ddaecb6922c10e3f7bd9a703928b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it is malicious and a phishing attempt. The embedded URL points to a suspicious domain, likely a phishing site. The ML classifier and ClamAV detection strongly suggest malicious intent, and the document body, though malformed, references installation instructions, aligning with a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=kwikset+909+installation+instructions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476952/normal_5ff33e94302d4.pdfIn PDF document text
    • http://kompledom.com/78654068424mqzhb.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/7hfIJsh/vafokela.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/gYhjjws/auto_tds_entry_in_tally.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/hijdgoy/super_mario_bros_adventures_shirt.pdfIn PDF document text
    • https://cdn.sqhk.co/pikukafil/iaDjegj/tro_choi_poly_art_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/daboxazile/xgisWia/soul_knight_codes_2020_secret_boost_codes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460461/normal_60198e7398ad0.pdfIn PDF document text
    • https://cdn.sqhk.co/metajewamiva/gGDgdjh/sexulifapasu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411270/normal_6033ebb84fb6d.pdfIn PDF document text
    • https://cdn.sqhk.co/mikitikotak/jjUFhG7/56091811412.pdfIn PDF document text
    • https://cdn.sqhk.co/zeliravepuj/oie1he4/46410414805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452372/normal_5fd2c7f2c5339.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/jihejdW/vijotu.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/emidDv2/happy_birthday_friend_meme.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/robumuduluwise/20578122859.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/beckman_coulter_email_address_format.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/17970659613.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_off0000fe55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE55 5216 bytes
SHA-256: b69134f6ff7ff23e19b77dbfb426161f9876ff610cd382edbef37771daf808de
font_01_sfnt_off00011033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11033 11860 bytes
SHA-256: 67d5678241db5f0ada8c95f3edf963ea2c3cd4e6b63f75f2a1b3ac03e505773e

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