Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da673682ce8205f…

MALICIOUS

PDF

87.1 KB Created: 2021-03-21 02:27:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: aaa518a8374ba053834db86d80590a5a SHA-1: 78724f88a85ecfa1649eb64b8f2329505da0831b SHA-256: 1da673682ce8205fc3c57bdf8a5987bd1529c53db4173ddec4cf536063250af5
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body is heavily obfuscated, but the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://golowaki.ru/strik?utm_term=ao+smith+reset+button PDF link annotation
    • http://kamaz-ftc.com/working_principle_of_ammeterhe31h.pdfIn PDF document text
    • http://premial.su/reporting_car_accident_to_police_wadxyhw.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/fwS2woa/24507690340.pdfIn PDF document text
    • http://gumidaz.medianewsonline.com/foundations_of_algorithms_5th_edition_solutions.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/jathiji/tigesavezodavawazezodoju.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/adverbs_worksheets_with_answers_for_grade_3.pdfIn PDF document text
    • http://zagejudivavi.sportsontheweb.net/gemaxojerarizi.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/gfFr6jf/download_bike_unchained_mod_apk_revdl.pdfIn PDF document text
    • http://sokolov.fun/maax_infinity_spa_partsix89i.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/d-link_dir-615_wireless_n300_router_firmware_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/jXe8Aia/national_food_buffer_stock_company_ceo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_451c884160de470cad417277cc98918a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/42b0a2b8-4c08-4256-b6fd-cf651fa33613/fender_twin_reverb_schematic_master_volume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b606bb85-89a6-4588-9600-56f95dcebdbc/lisapubesaxopov.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/42268820583.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/jebewetotojulul.pdfIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_93e60b4ce6b348169c952a370651af27.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/faxaxos/74626885796.pdfIn PDF document text
    • https://2ac8321c-28d8-41c8-ac7a-99137a6fe030.filesusr.com/ugd/157ee0_92d01b09828746bf96a407ed677f79cb.pdf?index=trueIn PDF document text
    • http://nujilexulajuwup.atwebpages.com/how_to_breathe_during_gym.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/35693564323.pdfIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_162ff857e64f47558343dbd5e9f382af.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E4 4696 bytes
SHA-256: 9cbd6b3c34c72cc7ccff81478bc097f7ba359617939702a897e52c8c7eaf6a67
font_01_sfnt_off000119ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119AD 11444 bytes
SHA-256: 621b91725843ec4cc0342a654b24b10b47f7117961cdb4a1108be17d8425ade6
font_02_sfnt_off00014096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14096 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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