Malicious PDF — malware analysis report

Static analysis result for SHA-256 c662d2860c597224…

MALICIOUS

PDF

87.3 KB Created: 2021-03-16 20:56:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0173699d94518fbafe5bba29d17a8c84 SHA-1: debaac91660f941fa11b8295cba95be73b3807ae SHA-256: c662d2860c5972249249d12f0afed0836728eece40c8f9a9a7bae07ddb9be633
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=my+wake+tech+student+id
    • http://instapriz24.online/frm_part_1_practice_questionsmg2jc.pdf
    • http://show-visitor.xyz/oxford_dictionary_english_to_gujarati_free_download44x3k.pdf
    • https://posesisex.weebly.com/uploads/1/3/5/3/135332701/ropafedaj.pdf
    • https://xafituku.weebly.com/uploads/1/3/4/8/134863640/aa9680257ea.pdf
    • http://buyervannakupitvsem.xyz/5z5ypf.pdf
    • http://batmbatm.ru/matlab_arduino_programming7n786.pdf
    • http://fruitslope.online/61908613791izaq7.pdf
    • https://ranalugepileli.weebly.com/uploads/1/3/4/7/134735155/539260.pdf
    • http://leadtop.co/gideperuji8nn3w.pdf
    • http://nikaold.site/nepinenagidefepukea7zy.pdf
    • http://presalle.xyz/surah_mulk_english_translationsc9n7.pdf
    • https://xedowekogo.weebly.com/uploads/1/3/4/6/134609622/runozonupovinenaworo.pdf
    • https://dunokosira.weebly.com/uploads/1/3/5/3/135349308/5e85daa3567.pdf
    • http://mists.space/best_nature_for_single_strike_urshifuk53ng.pdf
    • http://m-ryanaf.site/siginalisisolodobiv0omsh.pdf
    • http://babysampler.com/peter_max_net_worthelpcf.pdf
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/pidunagi.pdf
    • https://linepapimufuto.weebly.com/uploads/1/3/1/6/131637640/0f66cf7dba.pdf
    • http://cuzinfo.ru/define_the_term_impulse_of_a_forcelsm2s.pdf
    • http://roman-holidays.shop/systems_engineering_mastersfda2q.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_d6ce16de0c18423289a7472be4ab2265.pdf?index=true
    • https://69f6cc44-9198-4e41-bafa-43503dba92bf.filesusr.com/ugd/dec231_34f0b90c264f43e2b4ad986e2848c242.pdf?index=true
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_22c4d36aeea34a30a8e08ee26756af5b.pdf?index=true
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_fe4bb275159745ab96c6e0b807d8a23f.pdf?index=true
    • https://0c6b7a74-1ca0-41da-943c-c268a208a416.filesusr.com/ugd/fef373_c6a56223b53445c1ba49c629f62fdef6.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff6a.bin
6c18cda6065434e8df99a9e04d1e91d55b792fb2ee71c3b22c1abbd701927881		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6A 5164 bytes
font_01_sfnt_off0001111d.bin
162fd8bd785b46bd11a5c8133a6f94256bfeaf2b1673d4daa52c5e603a976eab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1111D 11576 bytes
font_02_sfnt_off00013866.bin
90063111fd84fc9d3bbe0e91a25c30074b178549c4c86487e0bfae44fa44017a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13866 16232 bytes

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