Malicious PDF — malware analysis report

Static analysis result for SHA-256 48b1427173e044e4…

MALICIOUS

PDF

78.7 KB Created: 2021-03-31 07:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bb83006d800ac62bac0bb3c17f169d8b SHA-1: 709e7ad901b806ce14ee1edadffa4487263903d8 SHA-256: 48b1427173e044e4a85f9dd5246eb68e75155a5733005ba0182f6ea7a7d5ac2c
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm designed to direct users to malicious sites. The primary URL, 'https://mezovuduw.ru/aws?utm_term=sanyo+tv+codes+for+magnavox+universal+remote', suggests a lure related to remote control codes, likely to disguise a phishing or scam attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://mezovuduw.ru/aws?utm_term=sanyo+tv+codes+for+magnavox+universal+remote PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418362/normal_602ade5b7a708.pdfIn PDF document text
    • http://juronesewuku.22web.org/apple_facetime_answered_on_another_device.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471455/normal_5fe790b46e308.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414161/normal_5ff25ba8e8db4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482619/normal_604dadaec0d4f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d115d978-d96a-40c8-9764-5d959708fc35.filesusr.com/ugd/436160_ff8395c6b62c4a64a3e18157739b3e2d.pdf?index=trueIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_b596283b77d049db9abc2faf7beb4fc7.pdf?index=trueIn PDF document text
    • https://2a984544-7cb8-4a4d-9f60-e686f7994e39.filesusr.com/ugd/1434d3_47d4140ef508405cb2beb51bcd089ab7.pdf?index=trueIn PDF document text
    • http://levapoloj.onlinewebshop.net/13469651759.pdfIn PDF document text
    • http://jabukejezari.epizy.com/mogikij.pdfIn PDF document text
    • https://3e1af3dc-cf37-4f58-935d-0a6065bc5ce9.filesusr.com/ugd/3ca236_32deca950d4045869b29cfc46f592243.pdf?index=trueIn PDF document text
    • http://rorazizaxaf.atwebpages.com/bepigegemutopomafa.pdfIn PDF document text
    • https://30de3caf-c510-4ce9-8691-b8280dc60d9b.filesusr.com/ugd/4980ee_3e07c7ba8b6a4240ad02e8365e5fa571.pdf?index=trueIn PDF document text
    • http://wegorabeg.atwebpages.com/zedodeze.pdfIn PDF document text
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_73b0e4ef5883462c9aef73fd88c84d7d.pdf?index=trueIn PDF document text
    • http://sudexixurijaxoz.atwebpages.com/treatment_of_brucellosis_in_cattle.pdfIn PDF document text
    • http://dowafirowelumex.atwebpages.com/grade_7_math_final_exam.pdfIn PDF document text
    • http://xukosebufeli.rf.gd/38175617756.pdfIn PDF document text
    • https://52c77544-2eb8-427c-ad0e-a8a7e2ea9366.filesusr.com/ugd/93288f_aee4e379462440d29fc61b6f24db5fee.pdf?index=trueIn PDF document text
    • http://sonisan.epizy.com/95385902743.pdfIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_00940fce1e344de5a1c9b8284350b37f.pdf?index=trueIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_c34ff038ab2b42d785b23fad69aaf1b7.pdf?index=trueIn PDF document text
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_6de1643c24b243a8a7dd6ba8898af93c.pdf?index=trueIn PDF document text
    • http://riberudedanute.epizy.com/doubles_plus_one_addition_worksheet.pdfIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_c2014ce15f524a47b9ea24ee6193d0db.pdf?index=trueIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CB 5676 bytes
SHA-256: b75911cc13d0da982dee9d1b1a5d685f61bb90d36d0594f2fb69abc42014db8b
font_01_sfnt_off00010a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1A 10228 bytes
SHA-256: f1c94dc8a16e4de3b842a533c2dccea5d46344d878f00ac0255ff0fcdacb517b

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