Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf2bdc7b418c3af…

MALICIOUS

PDF

73.2 KB Created: 2021-04-15 23:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e3a71cd6dcbb9efa1845c845763a809f SHA-1: 0889ebeb15373cdc836530add5655ee17ca6cc4f SHA-256: 7cf2bdc7b418c3afe3de892c781ff663b04c05c13ca8476a519070cd9205110d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://xajibur.ru/strik?utm_term=planeacion+estrategica+de+una+empresa+constructora PDF link annotation
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://specialsale.info/how_to_change_profile_pic_on_iphonexk26b.pdfIn PDF document text
    • http://triple-doska5.club/austria-_hungary_military_uniforms12tv4.pdfIn PDF document text
    • http://options.expert/t_maxx_3.3_engine_specs3l82b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387698/normal_5fd0857ea0762.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/heuy0XA/meme_maker_iphone_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404299/normal_6052845e985c3.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/if8sWje/deer_bow_hunting_videos_youtube.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369173/normal_6000fa7103e58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419827/normal_6021a5a47d984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_6028c2f958b5f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a5cad02a-5b90-40c5-b207-e6c63ed52f8f/ruzuretigusodumunefelon.pdfIn PDF document text
    • http://jiminoxesovibin.epizy.com/lg_4g_phone_price_in_bangladesh.pdfIn PDF document text
    • http://ratadipemor.epizy.com/human_resource_manager_job_posting_template.pdfIn PDF document text
    • http://josotemasafu.rf.gd/95089899158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e623b872-0e89-43d4-b8be-bad650fe37f7/6194252967.pdfIn PDF document text
    • http://fokezazonof.epizy.com/80491022304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca874599-aad2-47be-a32a-5a1e29b6566f/tabixonilunamefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d206305-bf24-4e27-9af2-e0c913a0a45b/sopubisot.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD260 5276 bytes
SHA-256: 6ffe7ef1b4572f308b932e02a05008e132a60088b085ab51b608841793a37895
font_01_sfnt_off0000e429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE429 11308 bytes
SHA-256: 12562342b1da5bc65166ff263b51cf2b9a798be67e167f306f139d43337329ac
font_02_sfnt_off0001090d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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