Malicious PDF — malware analysis report

Static analysis result for SHA-256 5882981552577a9d…

MALICIOUS

PDF

82.8 KB Created: 2021-04-29 02:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdfeadd97cba08b398192b72467e6bed SHA-1: 2812d2785d015268e7040f3c714d05ca363d92d2 SHA-256: 5882981552577a9d7a81340afeaceaf715b1da8cafd2530bce9e71c7a37a97cc
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 intended to trick the user into clicking it. The document body, though heavily obfuscated, appears to be a lure related to a search query.

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://ponafet.ru/strik?utm_term=que+es+un+autor+michel+foucault+analisis
    • https://cdn-cms.f-static.net/uploads/4393026/normal_6044db2fdf3dc.pdf
    • https://static.s123-cdn-static.com/uploads/4385235/normal_5feda13756b49.pdf
    • http://relibafogat.sportsontheweb.net/51175294030.pdf
    • http://dakekunagefasak.sportsontheweb.net/xetewumajanawudeji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bipovoromoj/bsa_camping_merit_badge_answers.pdf
    • https://s3.amazonaws.com/jefazaxal/88631898079.pdf
    • https://s3.amazonaws.com/tobovunoberiki/17027445047.pdf
    • https://uploads.strikinglycdn.com/files/07eda93c-554d-4f6d-b892-79c2fda521ea/kesiruduj.pdf
    • https://s3.amazonaws.com/vufuzewasi/molerabom.pdf
    • https://uploads.strikinglycdn.com/files/40fd532f-eba8-41bc-9c44-f8eb58aac2d8/best_basketball_drills_for_youth.pdf
    • https://s3.amazonaws.com/dikobepibelun/bitmap_image_set_center_android.pdf
    • https://uploads.strikinglycdn.com/files/6924e4ae-0fcb-4121-b5dc-9e5e877e5053/the_tube_amp_book.pdf
    • https://s3.amazonaws.com/suzujewa/my_cloud_ex2_default_login.pdf
    • https://uploads.strikinglycdn.com/files/7908124b-800f-432e-8174-89a66cd76a5f/what_is_the_irishman_rated.pdf
    • https://s3.amazonaws.com/pegebunov/what_is_the_formula_of_work_done_in_physics.pdf
    • https://s3.amazonaws.com/pogolo/vizulabowonodalowapa.pdf
    • https://s3.amazonaws.com/rezugekolaba/81918682001.pdf
    • https://uploads.strikinglycdn.com/files/da12b6f3-ca07-433e-b497-fedfbcd658bd/meroxanatij.pdf
    • https://s3.amazonaws.com/rezugekolaba/43100588037.pdf
    • https://s3.amazonaws.com/sesafefanulokam/vujefawijagomud.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104d8.bin
21ba3cc93eebbb518c5e8ec45db3247e352b5c4684a7e3f8de21cd94c563fe4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x104D8 5184 bytes
font_01_sfnt_off00011651.bin
f30b1fbe785c0562851c4b7d6866698b0432053c3632d8e83b7675bbfa513052
pdf-font-stream PDF embedded font (sfnt) at offset 0x11651 11536 bytes