Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a86aaea5a7432e7…

MALICIOUS

PDF

100.6 KB Created: 2021-05-17 23:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3490203aa2925b5cdf12592936a2aa9a SHA-1: cd8194edd1f40f3daa05febd9ecd6af694f565f6 SHA-256: 4a86aaea5a7432e792dffb592cb95a5ececc8003da6c20db232a6b82f89417ff
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to 'Discord server pfp' and is associated with an external URI pointing to 'bologen.ru'. This suggests a phishing or social engineering attack aiming to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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://bologen.ru/strik?utm_term=discord+server+pfp PDF link annotation
    • http://kufagexuwinu.22web.org/supply_chain_management_and_transport_logistics_john_liu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412181/normal_5fee416338e46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450502/normal_5fc5be316a48f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419424/normal_603fc4e0e3aaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418574/normal_6008b3aac5a20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410431/normal_5fe3156fd77d2.pdfIn PDF document text
    • http://gigabaru.22web.org/bhojpuri_film_nirahua_hindustani_hd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455183/normal_605f7349c3d54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466379/normal_6063436893338.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/zuxime/bollywood_dj_song_website.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/calculus_problems_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc198432-6adc-4735-8b4e-bedf39bea5a3/dd_warlock_spells_list.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/how_to_turn_off_flash_on_nikon_d80_camera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08d01759-adb1-42d3-9d9f-1e699f302868/how_to_make_better_bread_in_a_bread_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/formule_calcul_tva_hors_taxe.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/plantronics_c054_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/bowflex_pr3000_exercises_list.pdfIn PDF document text
    • http://tidefos.epizy.com/57690567560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3767227-a77b-4e2b-a6c4-5a9580db0c35/first_alert_smoke_and_carbon_monoxide_alarm_manual_pc1210v.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b46fe1-f903-4e20-a9ff-03d6e3c41436/dotuvanalituxilosutiw.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/58355367092.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB71 6420 bytes
SHA-256: 3e0e7ce7f31790091887ce385a78956f8755c62c213e296dc90b74473c595ba2
font_01_sfnt_off0000fb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB17 8148 bytes
SHA-256: fff1cd64cae8c1563d0a425632a1e682b08d04709bbed93d0cba866416baedc1
font_02_sfnt_off00011533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11533 4964 bytes
SHA-256: 3ede7279a078773d86c65a0f112afb7686646240588a4ed4dddfd366ff119e7f
font_03_sfnt_off00012637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12637 2316 bytes
SHA-256: 5b91c186c0d2506cbb1932d417fe2e40edf424c68f696d43443a27f8f7fee313
font_04_sfnt_off0001301a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1301A 5812 bytes
SHA-256: 1e3a2f9e832cbf9a190fe78606328e9545e447e144bef47c36a23e3541129171
font_05_sfnt_off00013eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB3 13812 bytes
SHA-256: 36861c9bfca15a26be3534c9930f335bd47226cebfff9599aaa8933dbbb39a5a
font_06_sfnt_off00016bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BCF 16668 bytes
SHA-256: 78d1b236d28ae4c827ca480be55eccc75cd4e5e4a336e67bc76333daea10ab3e

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