Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14774e849652027…

MALICIOUS

PDF

80.9 KB Created: 2020-11-24 02:54:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: dc8a768c5a4c58654555713dad4ec901 SHA-1: dbffa0625fece374b4973600073a3450c9e1d4ed SHA-256: a14774e849652027b5250a8d9728ac7a88c00249270db205a911524fec029b27
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://traffine.ru/aws?utm_term=android+bitmap+memory+size PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5fadd5f2c1baa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f9eda4844fe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413862/normal_5fa380b8b82c0.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/ratixifo/55723042785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/366e51dc-f163-4902-a4a5-aa0cdaadd62b/fofogupuwapila.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/medakok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bdf6ca6-6a36-4ed1-8696-30d499c2a01a/horario_de_clases_para_telesecundari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d358a45f-1f02-45ac-81d0-9247e7075a98/shooting_game_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b9ea209-9633-4954-804b-c9a98cd05443/the_sith_triumvirate_raid_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31958413-72f5-4077-92fd-a4e3c5c6bb16/words_of_power.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be87bdfe-eb1e-40e8-8557-f4e6b680cd49/calorie_counter_compatible_with_apple_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10954737-097a-45fa-86fb-dd6aeaff5502/19316740162.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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
stream_004_off00010ada.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10ADA 25468 bytes
SHA-256: 6acb63ad0e1c3741369b2a251b62ace98bd2364c235df47f6aee95ee8d88261e
font_00_sfnt_off0000d30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30F 5352 bytes
SHA-256: 486ffd0e50c9a7a8dee144632dea981c333336dedf401d4a1486afc38bd04943
font_01_sfnt_off0000e532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE532 10960 bytes
SHA-256: 4682dfa8bfd07e78231082169164c23e6414338645081d6a8ca4fef394602476

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