Malicious PDF — malware analysis report

Static analysis result for SHA-256 774aa02948168633…

MALICIOUS

PDF

82.7 KB Created: 2020-11-26 16:32:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 86aa802c530850ae499b3c75ad0c3ea1 SHA-1: b783313e0f9ca3b7eaa5fb8b3c940a860074c0be SHA-256: 774aa02948168633f75c67696b458c9755fb4bb29fd6ac6d2b8ee816764f03b1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous external links, with one heuristic specifically identifying a "PDF link farm" containing 30 external links. The document body, though heavily obfuscated, appears to be a lure related to "Beethoven symphony 5 piano sheet music free". The presence of external links and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to phishing or malware sites.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffe.ru/123?utm_term=beethoven+symphony+5+piano+sheet+music+free PDF link annotation
    • https://lanoxujuzon.weebly.com/uploads/1/3/4/6/134630121/255c285225165.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/d07c425542415c.pdfIn PDF document text
    • https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/viwasapitew.pdfIn PDF document text
    • https://rozolabo.weebly.com/uploads/1/3/0/8/130814594/zetaxebo-wokegutu-vuwaz-tipimamigisufu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420224/normal_5f9de4e82c80a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369501/normal_5f88767610188.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/duzexefemosaxe/92386965279.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/beep_test_score_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/the_book_of_amun_ra.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/jurnal_morfologi_cestoda.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/adobe_acrobat_pro_free_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/fate_grand_order_halloween_event_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/instrumentos_de_cuerda_pulsada.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/34407810449.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/16244264342.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE396 5440 bytes
SHA-256: c2c64f66c56c929647607a90c3340f01ef1ebf0eb052bee124fdf1fcb02fb203
font_01_sfnt_off0000f5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FA 10784 bytes
SHA-256: 1b3b18041b4b73aff1bf9e25031aec0b1ce320f86dc5efbf7f766dd10233f8af
font_02_sfnt_off00011a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7C 16100 bytes
SHA-256: b59afbb2f683942213df284fd86cd9422ada0c5f1ffac7698db8c94a40390bc4
font_03_sfnt_off00012f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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