Malicious PDF — malware analysis report

Static analysis result for SHA-256 51926e84ee305a12…

MALICIOUS

PDF

83.5 KB Created: 2021-03-07 18:47:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: dba417b7ba638cf1d9fb4b7d2ccf9930 SHA-1: 45a3f872cc8c0391f4efa73304524accf5639ae0 SHA-256: 51926e84ee305a12e12365d4a78a6b06b53cf60abd85fd154d8eaf91569636f7
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to host phishing content or a secondary payload. The document body, though heavily obfuscated, suggests a lure related to educational materials, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/wix?keyword=lesson+11.2+proving+figures+are+similar+using+transformations+answer+key PDF link annotation
    • http://technodom11.com/irobot_roomba_e5_5134_wi-fi_connected_robot_vacuum_reviewsyzdkl.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/comcast_remote_control_images.pdfIn PDF document text
    • http://wigevopane.iblogger.org/50365213968.pdfIn PDF document text
    • http://sefivolibaz.iblogger.org/when_nietzsche_wept_movie_online_sa_prevodom.pdfIn PDF document text
    • http://dfds.in/freshwater_aquarium_fish_pictures_and_names6fbza.pdfIn PDF document text
    • https://lumixomenuvaw.weebly.com/uploads/1/3/4/7/134745504/nosazalu-guruzukasaxifo.pdfIn PDF document text
    • http://warupipujamoru.sportsontheweb.net/clear_google_search_history_on_ipad_mini.pdfIn PDF document text
    • https://dabusoze.weebly.com/uploads/1/3/4/5/134585091/af5d0a33.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/26621427643.pdfIn PDF document text
    • https://verefatodefi.weebly.com/uploads/1/3/4/7/134722939/9734748.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/lowujarovoduti.pdfIn PDF document text
    • http://gizafetagox.epizy.com/why_wont_my_directv_remote_turn_off_my_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/54852828629.pdfIn PDF document text
    • http://gotuziput.epizy.com/xalewalegomelevulorewo.pdfIn PDF document text
    • http://wejanofe.rf.gd/buonasera_o_buona_sera_formale.pdfIn PDF document text
    • http://sugexure.rf.gd/bestwap._in_movie_song_2019.pdfIn PDF document text
    • http://zilanun.epizy.com/wovaluwagoputenewazez.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/44496576383.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/commonwealth_edison_outage_report.pdfIn PDF document text
    • http://tatinovewetede.rf.gd/arduino_nano_3._0_usb_driver.pdfIn PDF document text
    • http://rujemivegelap.epizy.com/king_bernard_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/general_knowledge_test_with_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D4 1800 bytes
SHA-256: 4b69bfd243e85fa6109f1b3cb36249f71f7a19cc7c5d9795e2ff941350456863
font_01_sfnt_off0000f19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19C 5696 bytes
SHA-256: e8684d26a2c00b769436a7c82999a26f8a3c9dd164cb973cff51a5912ea68ee4
font_02_sfnt_off00010523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10523 10728 bytes
SHA-256: bab80dc0bfc7016c0fd7b49f0ed517a759f50df290bc9c638a3378ac1b739936
font_03_sfnt_off00012a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A19 16120 bytes
SHA-256: 690e1e9059d2caeb6cd3f9d6ef5092f7d8da23797819dc8e5571095a1f86f8b5

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