Malicious PDF — malware analysis report

Static analysis result for SHA-256 b574c4e57d234f8c…

MALICIOUS

PDF

77.4 KB Created: 2021-03-01 01:59:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d7a3efecc85955c48af2ebd19c010f5 SHA-1: c1f8b0b0a26b393a6b6232a377c9385a6dc0b208 SHA-256: b574c4e57d234f8ca7b2160ee89d6297ebe51f9f5da98a18dfcf9ed9c47d633d
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, disguised with a search query for "black and decker weed eater gh3000 parts". This indicates a phishing attempt to lure users to a malicious site. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/123?utm_term=black+and+decker+weed+eater+gh3000+parts
    • http://sixesijilolun.mywebcommunity.org/what_does_canon_mean_in_art.pdf
    • http://rosutob.getenjoyment.net/bose_acoustimass_10_iv_review.pdf
    • http://tepugorotewole.medianewsonline.com/78210281109.pdf
    • http://lobabinuladeri.medianewsonline.com/vuridokufesefamalu.pdf
    • http://delinapod.mypressonline.com/how_to_solve_radioactive_decay_problems.pdf
    • http://toxipoxekej.medianewsonline.com/ue_megablast_vs_megaboom_3_deutsch.pdf
    • https://cdn.sqhk.co/mudogaxi/fKjaiaD/among_us_2_trailer.pdf
    • http://piwulag.sportsontheweb.net/new_2019_club_car_onward_for_sale.pdf
    • http://dajexori.mypressonline.com/how_long_does_it_take_to_sell_commercial_real_estate.pdf
    • https://cdn.sqhk.co/vukupamita/iisrhjD/61734485236.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fonibinaraj/bpmn_shapes_visio.pdf
    • https://s3.amazonaws.com/tipikaxe/998778131.pdf
    • http://dakafatuvuguviz.atwebpages.com/what_charger_does_a_nextbook_take.pdf
    • http://bavatesivo.myartsonline.com/taranis_qx7_battery_charger.pdf
    • https://s3.amazonaws.com/dewazewokib/modinagamebatilo.pdf
    • http://zitadufafasid.onlinewebshop.net/poulan_pro_pp5020av_carb_settings.pdf
    • https://s3.amazonaws.com/rabewiruzitewa/99972201307.pdf
    • http://wawefib.rf.gd/4535136481.pdf
    • http://widusop.atwebpages.com/28809650510.pdf
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3e2.bin
9c84aca5171cf4522e1fd23f3e5391e17c8e645cdcb740b4c3036af6865bd014		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E2 2900 bytes
font_01_sfnt_off0000ee27.bin
296c3b5b513d07fdf410773333f46af8d4e8a6b46e00eb4acab3918893eeeeb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE27 5844 bytes
font_02_sfnt_off0001021b.bin
deecc5ef59cd4ae14ca44ed284cc44f098719243558047f824a0628379adf378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1021B 11008 bytes

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