Malicious PDF — malware analysis report

Static analysis result for SHA-256 2718dc5aec3adbf6…

MALICIOUS

PDF

75.9 KB Created: 2021-04-21 10:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb27b182540f3dfacd5fcf834e408cd9 SHA-1: d4e069586d1325ebbf84d3fc9cad76669ad9fb40 SHA-256: 2718dc5aec3adbf6699b4e9302d0efa1c4f2ba15fdc1e49363cd00dd078c5ba8
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI indicate it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=medical+surgical+nursing+10th+edition+elsevier
    • http://o-karte-kopilka.com/8285270084b3put.pdf
    • http://onlinetiser.website/foxconn_h61_motherboard_specspnzo5.pdf
    • http://fb-pageunderreview.com/wewuto4t3w.pdf
    • http://legumajati.22web.org/zoribejofaxofiviratab.pdf
    • http://lifegirls.site/flying_birds_sound_effects_freenr850.pdf
    • http://lolkek.xyz/xumofajifexomuloxafapulopptszd.pdf
    • http://registrat.space/lunastra_field_guidej7nwa.pdf
    • http://bitcoinlearningcentre.online/divisibility_worksheet_for_grade_4n6nuh.pdf
    • http://ukrdomonis.xyz/g-shock_rangeman_gw-9400_price2vcem.pdf
    • http://fastpeysistem.online/fundamental_theorem_of_calculus_part_1_explainededzjo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://a134ef9b-a212-4d8e-a35f-da3d896bbd40.filesusr.com/ugd/dadc92_2c3518855e68420394ba5731a638bef9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3e9d0fcf-32a1-401b-8b83-4eee648e5a39/new_england_patriots_news_and_rumors_2019.pdf
    • https://uploads.strikinglycdn.com/files/d4d57691-faa7-4b4a-b758-0cb66c255b5b/87444728782.pdf
    • https://s3.amazonaws.com/vukujidor/death_note_anime_characters_database.pdf
    • http://kefujamulewim.epizy.com/income_tax_slabs_for_ay_2020_20.pdf
    • https://uploads.strikinglycdn.com/files/d0683796-e523-481b-a787-9eaf84f3917e/how_to_connect_bluetooth_on_jvc_kd-r320.pdf
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_fd1258f80dbc4d2fa810b302defb0374.pdf?index=true
    • http://gisinazujawapub.epizy.com/xoredokadawadox.pdf
    • https://s3.amazonaws.com/nakuzafol/18558510606.pdf
    • https://394fded3-a37f-45fe-8092-07e0884d2d31.filesusr.com/ugd/bdbc91_0170ed0a34a345cd86db7a9b3bff5dc1.pdf?index=true
    • https://5ccda086-29c7-4024-8a93-689df1f3b89c.filesusr.com/ugd/ed8107_f73f044b25be4749aad65a556a509bc8.pdf?index=true
    • https://s3.amazonaws.com/zuguvoxoki/watch_the_magicians_season_5_episode_1_full_episode.pdf
    • https://uploads.strikinglycdn.com/files/05294ba9-52b4-4562-afa6-3acf64eb0d5c/lupujo.pdf
    • https://uploads.strikinglycdn.com/files/4e9286f4-1e5f-4d4a-ba58-d45313a6bab9/big_green_egg_cook_chicken.pdf
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_f97e52d04198474ea24e5f92f287cfe0.pdf?index=true
    • 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_off0000dcf5.bin
cc1f18ff8b9ea7ac2692ca2c1fc22ec106a88da20aa3a27438717862788ad101		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF5 5344 bytes
font_01_sfnt_off0000ef1c.bin
886d09e38b692cf57cfbae2d85ba3d6d8d483a706e960a61e2916a9cea368237		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1C 10680 bytes
font_02_sfnt_off00011371.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11371 4324 bytes

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