Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a90e9c425f97c32…

MALICIOUS

PDF

76.7 KB Created: 2021-01-14 11:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a86a155c06f5b8f5cd132984342fe5a3 SHA-1: e161da4e21ebeb54765b4fe7b4a9586c0f177e59 SHA-256: 4a90e9c425f97c32a94208d505a259b53837c6c734e209bd4385efd15e11b0df
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier, specifically flagged as Pdf.Phishing.Trojan. An embedded URI points to a suspicious domain, traffset.ru, which is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, contains fragments suggesting a cost-related lure.

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://traffset.ru/123?utm_term=sand+lime+bricks+cost PDF link annotation
    • https://site-1237262.mozfiles.com/files/1237262/boot_camp_assistant_for_macbook_air.pdfIn PDF document text
    • https://site-1168430.mozfiles.com/files/1168430/ethnic_wear_online_shopping_websites_usa.pdfIn PDF document text
    • https://site-1176151.mozfiles.com/files/1176151/antique_cannon_balls_for_sale_uk.pdfIn PDF document text
    • https://site-1176864.mozfiles.com/files/1176864/47148424170.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410441/normal_5ff7ebf25bfe4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dovulavavo/autocad_2013_32_bit_installer.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/allshare_cast_wireless_hub.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/satta_king_disawar_ki_report_bataye.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/haladi_basanta_song.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/depodotenovutas.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/nowegufezunaxip.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/newspaper_template_google_slides.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/diazepam_actavis_patient_information_leaflet.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/bachelor_of_computer_science_books.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/geotextile_sheet_uses.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/terokapiwudud.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CB 5180 bytes
SHA-256: d7fa52fdaedcc18fd1288253c843a8626333a8a1d2707a7f7237fba6c64e6e58
font_01_sfnt_off0000f338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF338 10956 bytes
SHA-256: f8c455853ebf36e1ffc8647ff701ad703689c492b38c671f7a424894d31eddec
font_02_sfnt_off000117ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.