Malicious PDF — malware analysis report

Static analysis result for SHA-256 bca297604f9ccb7c…

MALICIOUS

PDF

94.4 KB Created: 2021-02-19 06:25:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 635c563ec0ef2a2a7d25fdd91e119483 SHA-1: ab48839b67e35f9ae3bd621b9c15419cdf27c26f SHA-256: bca297604f9ccb7c68207688580e91c2438afc12d16b2972d90f9e14ac6c06fa
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it's part of a link farm or SEO manipulation scheme. One of the primary external links points to a URL that appears to be a phishing or malware distribution domain. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://seumenha.ru/strik?utm_term=grade+5+expository+writing+samples PDF link annotation
    • https://mapaforidax.weebly.com/uploads/1/3/4/0/134012560/xegabituzo_repaxud.pdfIn PDF document text
    • http://yachts-4-sale.com/34313509804moz95.pdfIn PDF document text
    • https://sugowula.weebly.com/uploads/1/3/4/6/134646485/janasikubemi-nadulobe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444371/normal_5fdad7b62fd23.pdfIn PDF document text
    • https://melekutiruj.weebly.com/uploads/1/3/2/7/132740408/8f012ac47e.pdfIn PDF document text
    • https://zusajozaza.weebly.com/uploads/1/3/1/3/131381142/duwikabusezejabowi.pdfIn PDF document text
    • https://xizovetezewo.weebly.com/uploads/1/3/2/8/132814166/dutogasulidit_xejigara_kaguraxitogav.pdfIn PDF document text
    • http://custits.space/chevy_malibu_2005_lt_tire_size5tdus.pdfIn PDF document text
    • https://xodukibefapox.weebly.com/uploads/1/3/0/8/130873769/wapituxew_teposajoragovop_kewugif_mozopikisami.pdfIn PDF document text
    • http://copyright-security-ig.com/35245824686c4q6j.pdfIn PDF document text
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/6791039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463006/normal_5fd1b79661247.pdfIn PDF document text
    • https://sagagokibifaku.weebly.com/uploads/1/3/4/6/134625973/posizixoremap_jepegoxunafi.pdfIn PDF document text
    • https://fodakapi.weebly.com/uploads/1/3/1/6/131637942/7274622.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/xalexojaxipud/enzo_soresi_il_cervello_anarchico.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/present_perfect_simple_worksheets_esl.pdfIn PDF document text
    • http://nulazuwob.rf.gd/33749158626.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/java_quiz_games.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/56157771437.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
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C17 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off00011c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0B 5696 bytes
SHA-256: d5ea1259d82001cd3a2b61347d9e04f220b3d6d42f9d83582b807ee3ef9aeb9b
font_02_sfnt_off00012f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F76 11724 bytes
SHA-256: 81bf6c6047d663a6bd3697048e74cd0b6d9497768beac592220a7f2413742b0b
font_03_sfnt_off00015670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15670 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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