Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde4899a1f204430…

MALICIOUS

PDF

86.9 KB Created: 2021-04-05 19:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ff781720cc28244a6684bd173f67663 SHA-1: 98444e058a4a82ffc41eccbfa8392e9a6a092e55 SHA-256: fde4899a1f204430b1ec71706a1fcb8abd6ed596c9e2ff514c04aef742626c2e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to suspicious domains and are likely part of a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://midufefew.ru/wix?keyword=pokemon+ultra+moon+guide+book
    • http://lifeshop.pro/13124475137ip9ax.pdf
    • https://pebezudaxefen.weebly.com/uploads/1/3/4/3/134347708/1626048.pdf
    • http://zoziwasikow.22web.org/62236699709.pdf
    • https://vegonivi.weebly.com/uploads/1/3/5/9/135986737/fedinuxisix.pdf
    • http://homearfes.com/dell_latitude_e5400_batteryessww.pdf
    • https://rodugetimevo.weebly.com/uploads/1/3/1/4/131407281/bewakitidojagifus.pdf
    • http://testvvd.xyz/guidesman_flashlight_1000_lumensk5k1j.pdf
    • https://gesuveta.weebly.com/uploads/1/3/2/6/132680901/368819.pdf
    • https://joposiga.weebly.com/uploads/1/3/5/3/135399072/midiwinexogu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e3ba7771-1cf2-49b9-be81-d91832e8ed63.filesusr.com/ugd/bc9675_03a038a66dd94bb89c0c08ef7bd33321.pdf?index=true
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_446afee3d3444ff38dc2ad004a43d788.pdf?index=true
    • https://01d67eed-50ba-4ccb-8f82-c1581f7ed07e.filesusr.com/ugd/e3325f_9922ac497d0046a3b30fe1be883ee0f6.pdf?index=true
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_f3047f77e472458fad5ab42a48fe93fb.pdf?index=true
    • http://kodugexibitomo.rf.gd/talijizaneladet.pdf
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_f0a97cf8788b4120a4edf8eec70450ea.pdf?index=true
    • https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_43f4f7ca896a4468b996d9f3d7d0035a.pdf?index=true
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_ebe6fc1635d24784a3c017b6ebc815f7.pdf?index=true
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_0f3f4559479e48dcb71d01d06dd564ae.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e750.bin
4a381919e0a58a2c9e57fd256871d1fb56389b45e491f784e130a3c0e5c91c68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE750 5172 bytes
font_01_sfnt_off0000f8c9.bin
f833e01e676d722b0498b0fe8e685ef6d9e4564e7142ca05903aea7be0aa8cbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C9 4756 bytes
font_02_sfnt_off0001096f.bin
96e08731084942e4e11b04e77a5cb7daf0aef0e7d34d1a093db4d521acfe0ab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1096F 11476 bytes
font_03_sfnt_off00013044.bin
8a3d568d668a995c2d912c44851c707e6f48c00477c09b021195b6079d2a9619		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13044 16260 bytes
font_04_sfnt_off000145c6.bin
74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145C6 1736 bytes

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