Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9f01b599d6898e…

MALICIOUS

PDF

72.6 KB Created: 2021-03-30 20:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f6cea50850040db46fc61ccfb93e7f9 SHA-1: 7430d9f5f49b37a407378e83d6f56b7ceabb0dc0 SHA-256: 3a9f01b599d6898ee399fa9d3a7a5fe02ddc0be1608092175abf11d0a1628260
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a domain associated with phishing, and the document body, though heavily obfuscated, contains keywords related to 'word whizzle answers' suggesting a lure. The presence of PDF-specific heuristics further supports its nature as a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/wix?keyword=word+whizzle+answers+for+hidden
    • http://valezopifipob.22web.org/tom_and_jerry_meme_template_2019.pdf
    • https://cdn.sqhk.co/lagitesavap/lgcyfYi/60501797994.pdf
    • http://pijiruzu.22web.org/learn_hindi_through_english_by_dr_n_sreedharan.pdf
    • https://cdn.sqhk.co/bomemenun/yhizkjd/android_move_apps_to_sd_card_not_working.pdf
    • https://wusedutewaxugag.weebly.com/uploads/1/3/1/4/131437839/zuvujezorisajuleru.pdf
    • https://cdn.sqhk.co/zerurukoraju/jbgdJii/business_game_board_hd_images.pdf
    • https://badobokitevobux.weebly.com/uploads/1/3/0/9/130969603/8995864.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://muzizax.rf.gd/conceptos_de_calidad_segun_autores.pdf
    • https://s3.amazonaws.com/mokixetat/asrock_z170_pro4s_lga_1151.pdf
    • http://paxuwewenidaw.epizy.com/ielts_speaking_test_topics.pdf
    • https://s3.amazonaws.com/memobofilenabon/the_castle_kafka.pdf
    • https://s3.amazonaws.com/mupukesunobaga/nunobonebum.pdf
    • https://s3.amazonaws.com/wizedumi/element_compound_mixture_worksheet_high_school.pdf
    • http://bosefijov.epizy.com/20298733302.pdf
    • https://uploads.strikinglycdn.com/files/5e1375d9-47c5-4358-95d3-ab341504dfa1/9980752548.pdf
    • http://zebafuvevejol.epizy.com/add_watermark_to_adobe_acrobat_pro_mac.pdf
    • https://uploads.strikinglycdn.com/files/f12d1d52-3bcf-4a18-8dd4-a0a3e1c77f00/movuvewipokixinilo.pdf
    • https://s3.amazonaws.com/datarofapakil/house_building_plans_software_free.pdf
    • https://uploads.strikinglycdn.com/files/3ecab24b-ec46-42a5-ba03-e478626527b9/resumen_del_libro_de_romeo_y_julieta_en_ingles.pdf
    • http://pevibije.rf.gd/types_of_metamorphism.pdf
    • https://uploads.strikinglycdn.com/files/d4e0b7e9-d23c-45b9-8da8-f7ed78e129ea/59366056692.pdf
    • http://zepedijuva.epizy.com/53755390795.pdf
    • http://savikolapuxol.rf.gd/win_10_calculator_free.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de9a.bin
20b129589aa98e40fb91f7511d586de9c8d33043a65a3c31b4bd4a7b78c5be7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9A 5148 bytes
font_01_sfnt_off0000f03a.bin
27a03510f43b262e33f8f546876d449bc8b72f2aa419272c4dc97c1ca169b8bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF03A 10680 bytes

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