Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa517a7b51d23aa…

MALICIOUS

PDF

204.4 KB Created: 2021-05-11 19:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 630fb8b1c553834a45e989cff813e871 SHA-1: 9a5de55c4e95663f5bd7da6c6c17ff4d858b21b0 SHA-256: aaa517a7b51d23aa4a2c56100d2b54c2c18339d4ab1a289b9121c6818fdc88a3
136 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The presence of an external URI pointing to a redirector, combined with the document body's deceptive content, strongly suggests a phishing attempt. The PDF likely serves as a lure to download a second-stage payload from the identified malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://midufefew.ru/strik?utm_term=seat+of+the+soul+meaning PDF link annotation
    • http://nujijaj.getenjoyment.net/sipubazunelejonanipuba.pdfIn PDF document text
    • http://sravniproxy.info/malowol7lwse.pdfIn PDF document text
    • http://chatik85939775.fun/sokenuwejapixim40qpm.pdfIn PDF document text
    • http://gexulogoben.sportsontheweb.net/vanguardias_del_siglo_20.pdfIn PDF document text
    • http://joritirumag.mypressonline.com/motorola_cp200_service_manual.pdfIn PDF document text
    • http://hookup154.site/the_subject_complement_predicate_nominatives_answerskq9kj.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/95643272442.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://wegoluxetas.scienceontheweb.net/convert_to_tiff_ccitt_group_4.pdfIn PDF document text
    • http://servisvds.ru/bimafazmpogw.pdfIn PDF document text
    • http://xuratalusat.22web.org/61719849106.pdfIn PDF document text
    • http://jisorozasakima.iblogger.org/58501313662.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://53f03ce6-db0b-4f41-9bfc-6956ba41e1f4.filesusr.com/ugd/727e0f_e9139d020ca7444b9b68ca12f6f1d581.pdf?index=trueIn PDF document text
    • http://sipikoz.epizy.com/powered_parachute_flying_handbook.pdfIn PDF document text
    • http://renaxodemebi.rf.gd/angry_birds_star_wars_2_game_apk.pdfIn PDF document text
    • http://lavuradisaxel.epizy.com/hyperplasie_des_cellules_caliciformes.pdfIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_6970158a3eb84f1f8b1157786f3ebafe.pdf?index=trueIn PDF document text
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_51e7b02676534fa6938d6aa71effd919.pdf?index=trueIn PDF document text
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_d3f6238db4c944c4b9e9a36705b8bf0b.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_off0002d52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D52E 5188 bytes
SHA-256: 91c8b927e47d66c684907997b950af032fb653e75cd76ade09264e32da9be7ce
font_01_sfnt_off0002e6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6B4 23000 bytes
SHA-256: 453739f51c3fd545e05bab9aa7e42bf3a4a7962f092a681fd71768c6e34457b7

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