Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc00b059bd2761c9…

MALICIOUS

PDF

81.8 KB Created: 2021-03-25 10:50:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 27f3caad15c2ce5fb981467d34053c9d SHA-1: fd522314ebab10468e0210359b853afe80e3cdb1 SHA-256: fc00b059bd2761c9bdccb265c45b13f6608ac9a5e4ee9992509c06371c981a7c
96 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 embedded URI pointing to 'resalured.ru', which is likely a malicious domain used for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to academic search terms, suggesting a social engineering tactic to encourage clicks on the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/award?keyword=definition+of+curriculum+development+by+different+authors+pdf PDF link annotation
    • http://academic-club.ru/2575109239rhfzw.pdfIn PDF document text
    • http://big-ita.space/rii_2.4g_mini_wireless_keyboard_with_touchpadb65yo.pdfIn PDF document text
    • http://urott-hu.com/age_of_war_flash_game_musicnwmlc.pdfIn PDF document text
    • http://ellmax-site.xyz/paggawa_ng_book_report_sa_filipino1gngu.pdfIn PDF document text
    • http://all-host.site/train_a_railroad_connection_games574id.pdfIn PDF document text
    • http://idealicaitalia-official.site/what_causes_a_garage_door_not_to_close_all_the_wayhmtem.pdfIn PDF document text
    • http://coupons2020.info/gopro_hero_7_firmware_updatejx7sc.pdfIn PDF document text
    • http://artrosil.xyz/67072572519jkoqe.pdfIn PDF document text
    • http://new-volosi.ru/namikakavewozuguzutowatvsdh6.pdfIn PDF document text
    • http://talakam.space/carlson_fisiologia_de_la_conducta_pdxgv8u.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/will_beats_replace_my_headphonesdva47.pdfIn PDF document text
    • http://mrshadow.net/duxosot0vhx3.pdfIn PDF document text
    • http://tomogorman.com/the_promised_neverland_isabella_lullaby_sheet_musicmj9jt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/bollywood_mp4_movies_free_websites.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bacbc69e-a434-470d-ad09-7d8883d00061/cul_es_la_estructura_de_un_texto_narrativo.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/97084846056.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/xijaxijuriwebezukogufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/484e327a-c366-44f6-9a92-7a125c9ab72c/yamaha_djx-iib_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/36326529978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bb52dec-c5ba-488b-a569-c7c07dee2f5f/what_information_does_the_nurse_give_to_romeo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53b33536-a10f-464c-88df-784be172c971/79519586554.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/tetolepivoladogasi.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/77040515712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65ca489e-2fd1-4417-a067-4436836e5d64/308_175_grain_sierra_matchking_load_data.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/show_me_the_cast_of_how_to_train_your_dragon.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10013 5696 bytes
SHA-256: a0ea6654e3db8169e8b187014b39e76aa43698652c85068c6dc62908a10ad831
font_01_sfnt_off00011356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11356 10704 bytes
SHA-256: b03468768659e1b7b03782a37e955601c632d692ed69d4f1050e8733abd3e62e

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