Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1890e610f50e77e…

MALICIOUS

PDF

100.8 KB Created: 2021-03-26 17:50:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c135b07c766657dd67600d1253a56ab0 SHA-1: 1632e45094b70bb532f03ed7e70d962d759bb571 SHA-256: f1890e610f50e77e8c72d89d615025c0ab04840cebf497a70bb90c699670414f
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to 'resalured.ru' and a heuristic indicating a visual download button lure. While no scripts were extracted, the presence of these indicators suggests the document is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/award?keyword=arduino+cnc+drawing+machine+pdf
    • https://cdn.sqhk.co/marixefe/7hfidje/sivimemilezutadaw.pdf
    • https://cdn.sqhk.co/kejofuvata/tjjggZh/lapejakuwelejuvagalepilow.pdf
    • https://kifofudodor.weebly.com/uploads/1/3/4/8/134878181/lonede-porididisedij-vefilivufekosux-sofadapopuxi.pdf
    • https://cdn.sqhk.co/wiluxuko/jhgiEgh/college_football_playoff_national_championship_2020_tickets.pdf
    • http://gezilobogobig.22web.org/tekarinuwuvorepetode.pdf
    • https://jososipiwudamuw.weebly.com/uploads/1/3/2/7/132740918/997abac9f672.pdf
    • http://front-glass.space/sulitowaku6s7v8.pdf
    • https://notuvovezed.weebly.com/uploads/1/3/1/3/131382721/midotabaguzol_gozemidafef.pdf
    • http://xalowazejadiv.getenjoyment.net/radical_candor_free_download.pdf
    • https://cdn.sqhk.co/miseseren/blicjhw/galaxy_theatres_cannery_north_las_vegas_nv.pdf
    • http://adminhalil.com/a_mothers_reckoning_sue_klebold4i2zi.pdf
    • https://gusujosu.weebly.com/uploads/1/3/0/7/130775940/tusedono_rivozobu_pejunerijini.pdf
    • http://rasipafus.getenjoyment.net/best_wendler_5_3_1_app.pdf
    • http://nakidki-alkantara.xyz/how_to_play_sorry_fire_and_ice_instructionsxef4x.pdf
    • http://lulopoboxefon.scienceontheweb.net/asus_sabertooth_990fx_r2_0_manuale_italiano.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b8d783d5-63d2-4bdf-9233-72398a4ca7bc/how_to_change_hp_deskjet_2652_ink.pdf
    • https://uploads.strikinglycdn.com/files/55394951-76e0-44a3-ae98-75adc8d2fea3/36100466595.pdf
    • https://uploads.strikinglycdn.com/files/d2a90ed5-2885-452b-8919-9664a9218e15/wojigerenojofakefawukewox.pdf
    • http://livuladebugalab.rf.gd/rumi_poems_love_farsi.pdf
    • http://ligifufeg.rf.gd/nenawetuterogudikur.pdf
    • https://uploads.strikinglycdn.com/files/ad847ca0-41e3-4cb7-872c-2fd961286b47/buy_old_law_books_online.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001346c.bin
3d78b5c393a4ac12034ebe29d7f078f00a6af2227ad9497ce1ba22876295565f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1346C 5440 bytes
font_01_sfnt_off000146da.bin
3f8d257bd2f59382b43b456fd8f74969e525fd646ff413c3116ebc46c084ad0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146DA 11796 bytes
font_02_sfnt_off00016f56.bin
a8b0c25172aa9b5bc08eee067abf1650770238587142d73506cc124324baa444		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16F56 16436 bytes

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