Malicious PDF — malware analysis report

Static analysis result for SHA-256 407a6939340e9d37…

MALICIOUS

PDF

133.6 KB Created: 2021-03-16 18:13:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdeebc07a09722da94dfc95903c4b8a8 SHA-1: 9c5ec228a635b1d125199d0b330683e798626e60 SHA-256: 407a6939340e9d37726f595439b0275a670f6128a77123c6f2ac326172a554f9
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a large number of external links, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a keyword that might be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://xezojetit.ru/wix?keyword=lemonade+mouth+pdf+espa%25C3%25B1ol
    • http://kopawaruda.22web.org/character_reference_letter_template_australia.pdf
    • http://appeal-ig.com/936400068324q3wl.pdf
    • https://giweberemep.weebly.com/uploads/1/3/2/6/132682555/xotefoludulew_tedixigif.pdf
    • https://podogavefa.weebly.com/uploads/1/3/1/4/131438056/buduwuxupa-tarul-luribo-degovabufekes.pdf
    • http://fimewovoko.getenjoyment.net/9275581536.pdf
    • http://kavelux.22web.org/vupifokisonudu.pdf
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/e29d32725.pdf
    • https://zogowejodumuf.weebly.com/uploads/1/3/0/7/130775171/e063f4.pdf
    • http://kasyanbeauty.com/minn_kota_talon_151zii5.pdf
    • https://gebapawuvafiv.weebly.com/uploads/1/3/4/5/134519736/dd5582e18e.pdf
    • http://wazepewazivulil.mywebcommunity.org/11628859626.pdf
    • https://pipovako.weebly.com/uploads/1/3/5/3/135300091/fusawo-jexudiwegadesaj.pdf
    • http://wdd13.ru/evangile_de_philippekzhcw.pdf
    • https://tozikogok.weebly.com/uploads/1/3/5/3/135330875/wijik.pdf
    • https://kaxozugusejerob.weebly.com/uploads/1/3/1/4/131452826/961b77d54191a97.pdf
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/nofipobobetane.pdf
    • https://lapolepep.weebly.com/uploads/1/3/1/4/131406498/86847.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xepalufozakot.epizy.com/math_answer_8_2_2_2.pdf
    • http://govomasoleva.rf.gd/34425360164.pdf
    • http://vulebodifoguvar.epizy.com/starting_strength_accessory_work.pdf
    • https://9a4203bb-6ff2-4ef1-9c63-3f113f84a884.filesusr.com/ugd/ea9bdf_bec57fd6df8649eba29ccb727a50b675.pdf?index=true
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_9f96875f77564e0091498cf09441c638.pdf?index=true
    • https://ac734925-007a-49fa-9a6b-2340142042ec.filesusr.com/ugd/ea78e0_0ebfce35c92a45b38564f52278ca16cd.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018489.bin
1d3a8d43c61dc3f426f2dcd3a180d80c1cd66049bacbd791aee1a61f2ff0fe89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18489 6832 bytes
font_01_sfnt_off00019c1d.bin
b21ae2dceab27044c4d7603cbcce213439ca7b63d72b8b8ab93db406ad6fb9cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19C1D 5336 bytes
font_02_sfnt_off0001ade2.bin
28e2e435d69281acee4ae75a77bb6dbc6f46c41bed60349273beba7e589d163a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADE2 20016 bytes
font_03_sfnt_off0001e948.bin
4cf79b5c84b7c33928a496aa7ec4e96ce5c14dadaf77142dd5a5ec055a239db6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E948 18364 bytes

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