Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb1ddc088f32fab…

MALICIOUS

PDF

647.9 KB Created: 2021-04-15 05:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26be58ae7eb47886b0facf2ff5d3c2f0 SHA-1: dc1efb89bf04676664ecc6f8d45dc0f4a9680a0a SHA-256: ffb1ddc088f32fab8cdd63e0a1ab6eeab1549379f9c086524ed09aa222f00182
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The document body, though heavily obfuscated, contains text fragments that suggest a lure related to a chemistry question. The presence of an embedded URL and the ClamAV detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5652

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://pelibifir.ru/strik?utm_term=which+is+stronger+acid+ch3cooh+or+ch2clcooh
    • https://cdn-cms.f-static.net/uploads/4464319/normal_5fe7f66164c37.pdf
    • https://cdn-cms.f-static.net/uploads/4466996/normal_603f56d1d934d.pdf
    • http://giwewigipebi.medianewsonline.com/allegory_of_the_cave_summary.pdf
    • http://tufuwavaziga.mygamesonline.org/82411477005.pdf
    • https://cdn-cms.f-static.net/uploads/4389097/normal_605fb29f64ae8.pdf
    • https://static.s123-cdn-static.com/uploads/4381541/normal_5ff64b0638528.pdf
    • http://gexopidikimo.mygamesonline.org/the_crown_season_3_episode_8_wikipedia.pdf
    • https://cdn.sqhk.co/ranemagesoga/lhftYii/download_galaxy_live_wallpaper_for_pc.pdf
    • https://cdn.sqhk.co/rekutadis/ghugdhc/prisma_photo_editor_per_pc.pdf
    • https://cdn-cms.f-static.net/uploads/4464530/normal_5fd22d259f734.pdf
    • http://nizavevorupuj.mywebcommunity.org/muvunuwuvawizeja.pdf
    • https://cdn.sqhk.co/wakivugex/iNRib7I/dojejemomifukuwezoregos.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8520c14c-8032-4945-a171-8a04f7c74b12/aca_bill_vote.pdf
    • https://s3.amazonaws.com/mutirexa/14190223433.pdf
    • https://s3.amazonaws.com/garorowa/golds_gym_trainer_410_treadmill_manual.pdf
    • https://s3.amazonaws.com/xajowu/lesanojum.pdf
    • https://s3.amazonaws.com/jutenojamega/brother_mfc-495cw_ocr_software_download.pdf
    • https://s3.amazonaws.com/kovilowab/lexis_audio_editor_apkmonk.pdf
    • https://uploads.strikinglycdn.com/files/010d520a-8adb-4df4-97b6-0bac892e0d7d/xiwaduvumesogavapodosevu.pdf
    • https://s3.amazonaws.com/dexodekelaseki/25642745315.pdf
    • https://uploads.strikinglycdn.com/files/82775697-0fdf-42ad-8a0b-202343c2e3e0/why_wont_my_jbl_soundbar_work.pdf
    • https://s3.amazonaws.com/pusolefosex/26061693903.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0009aec1.bin
de0ba63a6dfdc6cbfee0b1d5f09e03b27045519c1303e2f2e2c34c223f7f29fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AEC1 1560 bytes
font_01_sfnt_off0009b6c8.bin
f7315d5eeebfbfd9fb70b47621d7260c1ae55666352c02d78ed4cab071d5c5a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B6C8 5512 bytes
font_02_sfnt_off0009c996.bin
8a6b2765476efaec19d67a7e6d919a76ef64a5a51f1e9c8f23da90835f53396b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C996 13116 bytes
font_03_sfnt_off0009f63e.bin
1a1459b06cf6999d22f20c7b6fb075ac2e599e16fd60b37e95f308da1a474856		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F63E 16196 bytes

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