Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd071d248aa6ad03…

MALICIOUS

PDF

81.2 KB Created: 2021-03-31 17:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 63df55997d576540569afbc241153d71 SHA-1: f764bb6696aaa5b89ea94bae5b3916d3d991c05a SHA-256: fd071d248aa6ad03c5f5d9f4b98ec5238c0110f4f411d00e2d9f813a4c3915ac
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific ClamAV detection name of Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0. An external URI, https://resalured.ru/strik?utm_term=how+many+pages+are+in+the+book+wonder, was extracted, indicating a likely attempt to redirect the user to a malicious site. The document body is heavily obfuscated and unreadable, but the presence of the malicious URL and the ClamAV signature strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/strik?utm_term=how+many+pages+are+in+the+book+wonder PDF link annotation
    • https://cdn.sqhk.co/paxepilekot/igdnIJE/33274090977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501027/normal_601b1e7da5026.pdfIn PDF document text
    • https://tusidotug.weebly.com/uploads/1/3/4/4/134482214/bb6b6e7a65a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379363/normal_60028ab6d2c21.pdfIn PDF document text
    • https://jotesufuxave.weebly.com/uploads/1/3/1/4/131483421/tizam.pdfIn PDF document text
    • http://glawerry.online/assassination_techniquesaucak.pdfIn PDF document text
    • http://bluebadgeapproval.com/86902851705b0lgx.pdfIn PDF document text
    • http://tipografiyav.moscow/59097724690o3uo2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424024/normal_5fd1f0881ce77.pdfIn PDF document text
    • http://ridunculus.com/snap_on_1_2_digital_torque_wrench_atech3fr250bez51c.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/ejagcjb/36737094525.pdfIn PDF document text
    • https://vozirelekoru.weebly.com/uploads/1/3/4/5/134594553/1724283.pdfIn PDF document text
    • https://rivewatot.weebly.com/uploads/1/3/3/9/133999312/mufokezoxad_xufimigo_vowilodebuvom.pdfIn PDF document text
    • http://goodsfor.life/how_much_a_foster_parent_get_paid_in_florida963p1.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/KXhacFE/sosowegowufovukepazol.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/dljilx5/paris_travel_guide_book_free_download.pdfIn PDF document text
    • https://nerolokem.weebly.com/uploads/1/3/5/3/135326062/5977039b04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469370/normal_5fe90dfac69a8.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuwatipo/iV6hcBu/mp3_player_3d_android_apk.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/wazagidonux/budget_planner_template_free_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/52544476354.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/a_level_biology_revision_guide_aqa.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/brawl_stars_iphone_to_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/15022995193.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_off0000fe78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE78 5700 bytes
SHA-256: 519844c6d26684f3a804c100c5128004bc24dff02e2e7a386245412ce0b074ed
font_01_sfnt_off000111c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C8 11020 bytes
SHA-256: 2a709a244a122324d55e26b98bb90827a2b12d5c52a6c135fd9936b5828d6f1a

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