Malicious PDF — malware analysis report

Static analysis result for SHA-256 714225dc6db14d77…

MALICIOUS

PDF

71.1 KB Created: 2021-04-01 21:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 34697b18bf26d7257a88e0ab96715c86 SHA-1: 73cc78f7c393efbb57b2fc5ddd0995a14a0306cf SHA-256: 714225dc6db14d7739f69beb21b4ca70cfe5e9e1d3506d63dcc77d072beea0fc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or scam attempt. It contains numerous URLs, many pointing to disposable hosting, suggesting a link farm or redirection mechanism. The document body, though garbled, contains a search query that aligns with the external URI, reinforcing the lure. No scripts were extracted, but the PDF structure and URL patterns are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=what+did+enlightenment+thinkers+believed+the+purpose+of+government+should+be PDF link annotation
    • https://mefiwipof.weebly.com/uploads/1/3/4/3/134320940/tabegisipiri_gadolasixi_vinereso.pdfIn PDF document text
    • http://thrivewebs.com/lasuwirejimigibotubiwamut4rpc.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/23620781703.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/the_magic_school_bus_chapter_books_set.pdfIn PDF document text
    • https://pemolodubi.weebly.com/uploads/1/3/6/0/136052155/bajigamivetabema.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475564/normal_5fdde1627f7d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_601f1db98441a.pdfIn PDF document text
    • http://innov-cis.net/manual_autocad_electrical_2018_espaolvsgf7.pdfIn PDF document text
    • http://otshelnik.net/plc_course_in_coimbatoreblsn0.pdfIn PDF document text
    • https://mofafodoler.weebly.com/uploads/1/3/0/8/130874416/1656663.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417999/normal_5fc733ac35f27.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rajunuximu.epizy.com/793490573.pdfIn PDF document text
    • http://wesokojoposad.epizy.com/how_to_cancel_final_cut_pro_free_trial.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/biputimodipebidininenezev.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/excel_vba_range.find_exact_match.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/sadafexokovugawovopofuza.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/how_much_is_a_real_christmas_tree_in_florida.pdfIn PDF document text
    • http://purubonosarule.rf.gd/bupixawuwefotenenuw.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/avery_template_5167_word_doc.pdfIn PDF document text
    • http://tunajuxogililog.epizy.com/informante_minero_convocatoria.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CE 5732 bytes
SHA-256: 7de6bcb404016cd4d479c892522383c15ab441f0b2245b2552d4d3e258c80551
font_01_sfnt_off0000e932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE932 11012 bytes
SHA-256: 215dd00e85cf402d9aba210c218dbd565329e23c5822112a7ac144a955bb9c01

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