Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa583895cc5f3263…

MALICIOUS

PDF

78.9 KB Created: 2021-03-10 22:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2118c27dde9dfddea828c20bd0769e31 SHA-1: 78ddbcfe516065900a4cbe495cc1a83239f4428e SHA-256: fa583895cc5f3263f4e4f70085663ac6816d9ce0e5b97837d49eed46620626bc
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 URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a secondary payload. No scripts were extracted, but the presence of the external URI is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=mockingjay+plot+summary
    • https://static.s123-cdn-static.com/uploads/4425484/normal_5ff687ac72d16.pdf
    • https://static.s123-cdn-static.com/uploads/4490519/normal_5ffc9fd9bed02.pdf
    • https://static.s123-cdn-static.com/uploads/4422382/normal_5fe5341d5b262.pdf
    • https://static.s123-cdn-static.com/uploads/4370288/normal_5fcb7a5aba5e1.pdf
    • https://cdn-cms.f-static.net/uploads/4454968/normal_601ffd1aea79a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/gurupixabogivaz/wanivubajixoxafoxigisuku.pdf
    • http://danofef.rf.gd/integral_calculus_basics.pdf
    • https://uploads.strikinglycdn.com/files/35e4f827-f3d0-4e33-81f2-9509bce5e966/wine_enthusiast_16_bottle_wine_cooler_manual.pdf
    • https://uploads.strikinglycdn.com/files/3fe196af-ba3b-4b52-a2bf-56dc003eacc6/how_to_bleed_3_ton_floor_jack.pdf
    • https://uploads.strikinglycdn.com/files/f0ed7140-320e-4772-9bad-5c8beda27ecc/harry_potter_lego_castle_toys_r_us.pdf
    • https://s3.amazonaws.com/nisiwanolom/79471495578.pdf
    • https://s3.amazonaws.com/zedilegol/18509226343.pdf
    • https://uploads.strikinglycdn.com/files/90d7e9bf-585c-4798-9cf2-d9ff3e6e99a6/how_to_thread_a_necchi_supernova_sewing_machine.pdf
    • https://uploads.strikinglycdn.com/files/17637cbe-d5fc-47d2-9fe8-1de0765d8f3d/24456737776.pdf
    • http://bazogojuzularib.rf.gd/70084173644.pdf
    • https://uploads.strikinglycdn.com/files/5206d87a-bf3d-4349-86c8-f7dd76dcb71d/bakumidumevitowani.pdf
    • https://s3.amazonaws.com/zuponefi/nesevevis.pdf
    • https://s3.amazonaws.com/wifukedot/creative_sound_blaster_x-fi_surround_5.1_pro_usb_audio.pdf
    • https://s3.amazonaws.com/kefefetafij/pride_celebrity_xl8_mobility_scooter_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e92c.bin
533120c84b20c9298bf1e01ac790569370c6fff8dda2896651ccd943d18e0afe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE92C 5264 bytes
font_01_sfnt_off0000fb03.bin
b5bf9483e99dce5ed307acc1b354851343335ff488ed0489604771f08e309166		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB03 11028 bytes
font_02_sfnt_off00012097.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12097 4324 bytes

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