Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffec2f9176e76782…

MALICIOUS

PDF

164.9 KB Created: 2021-04-04 01:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 00aa4a9f32cf3dc3a43a65baa9d9d069 SHA-1: 35fb0a405df73af9549832e8a42699927fdd91cb SHA-256: ffec2f9176e76782f2994f147c7e5c9a6c58c642d3d1880673e97a713adaa519
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 a suspicious domain, which is likely intended to redirect the user to a malicious site for credential harvesting or further malware delivery. The document body, though heavily obfuscated, appears to contain keywords related to a product, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/strik?utm_term=dell+inspiron+one+2330+i3+specs PDF link annotation
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/lugitonoxetez35zth.pdfIn PDF document text
    • http://bexunorisomev.iblogger.org/automatic_flight_control_systems_mclean.pdfIn PDF document text
    • http://begotilujaxijis.iblogger.org/vuzawejiban.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d66328d-d5a4-4572-9855-28f8f8f86567/wisideb.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/ben_10_omniverse_2_wii_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/wumubukorapop.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/love_actually_theme_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dae2910-6cf0-4ee0-b9d3-7f90ef1c8e4c/el_nombre_de_jesus_acordes_jaime_murrell.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/best_quiplash_answers_list.pdfIn PDF document text
    • http://tefotesibeto.epizy.com/teragujemeduwa.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/zunenijolipibaneguvup.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/43009546254.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/best_android_one_phones_september_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/chikku_bukku_raile_vandi_song.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/transunion_free_credit_report_online_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b37bf50a-4480-4b25-9ddc-325cbd8da0d6/bovatojikigelorepa.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_off000126c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C2 85496 bytes
SHA-256: 09580d2e1fb3ca747ab1be87668a923ea1d6395cc6eaefa0e62846962d1c49cb
font_01_sfnt_off000225ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x225EC 5156 bytes
SHA-256: 6cccbe31aca4a3a52b8aad238235aea6d79a99f2ae94e577bb618d686d5d9e97
font_02_sfnt_off0002378d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2378D 20524 bytes
SHA-256: 2cbfdeb1bf8209028b70e5801aa07e91e531e0c08d2304953edb3b631aac89ba
font_03_sfnt_off000270b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x270B3 16160 bytes
SHA-256: 71fec8a3adfe41455811528c654ef740a0d97889ddd19e39e153b04b7507b7f0

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