Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca8678934b4293ed…

MALICIOUS

PDF

83.4 KB Created: 2021-03-01 15:50:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e2ed61a8e04f99457bf36dbccd5cc691 SHA-1: 1b160cd3f66d20b79356408eb9cf015973991038 SHA-256: ca8678934b4293ed21dd9257bc854db1b821c60fadfeda4c57448b0920375ba5
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document contains numerous embedded URLs pointing to various domains, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the malicious intent of directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/wix?keyword=watch+skam+france PDF link annotation
    • https://vopisozojozesa.weebly.com/uploads/1/3/1/4/131407388/mugolumuponepep.pdfIn PDF document text
    • https://bikezurikol.weebly.com/uploads/1/3/4/6/134612173/vuguvosiwudefuz.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/avery_labels_template_51621xv4d.pdfIn PDF document text
    • http://znakomstva69.space/classic_leveling_guide_undeady9pr8.pdfIn PDF document text
    • http://biotringel.shop/wavevudiliduresefelazoa0d.pdfIn PDF document text
    • http://natbeach.space/nebatefojanukotozunugetigv358q.pdfIn PDF document text
    • https://cdn.sqhk.co/wikelere/4eOufif/rodolun.pdfIn PDF document text
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/tatoja_funak.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/2ihjjhd/qs_world_university_rankings_2019_chemical_engineering.pdfIn PDF document text
    • https://cdn.sqhk.co/dedejosewor/cjjjahc/liwus.pdfIn PDF document text
    • http://summer-italy.fun/what_are_good_drinks_to_mix_with_crown_royalxdkjc.pdfIn PDF document text
    • https://fesomexipilajuj.weebly.com/uploads/1/3/3/9/133997099/fd5959b.pdfIn PDF document text
    • http://freshmind.net/26284016678e9s1l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B7 6872 bytes
SHA-256: cfd810a5ea282119da4c1abf509a1e6bf8c77e42bfdbea3e308bbcdcc7c40f73
font_01_sfnt_off0000e20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20D 5168 bytes
SHA-256: 88b48ec95424af9e361670e14838f84a4020661f82d7f6c298508a965b988eae
font_02_sfnt_off0000f377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF377 4584 bytes
SHA-256: 8a1a35b3dc149fa868045e098e23355faa14964a54e79313175332ffc4e9a7e7
font_03_sfnt_off00010409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10409 10696 bytes
SHA-256: 853a9ab0199bcd955666b36d1880f05b5d5f3f94c15c405954a2132ac4051218
font_04_sfnt_off000128e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E9 16768 bytes
SHA-256: 4bb9a0079d8f33f94ff52e5d9f2edeac8d7a546d87c96b126d85e7524f05560f

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