Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40893e86d8a86d5…

MALICIOUS

PDF

79.1 KB Created: 2021-02-23 12:04:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3fadb0525e757e6815b16fba3b3ce08a SHA-1: 5b0faffb029d1548d4975aaa7ae2c4ba9ef595b9 SHA-256: d40893e86d8a86d5cdc6f187ea9fbc52b9ab0fcf3fe702a918fc54b4f60e2b5c
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'jacksth.ru', which is likely a phishing or malware distribution link. The document body, though heavily obfuscated, appears to be a product listing, suggesting a social engineering lure.

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://jacksth.ru/123?utm_term=krups+xp1500+coffee+maker+and+espresso+machine+combination+black PDF link annotation
    • https://cdn.sqhk.co/xavipinav/gjjatgi/audiotool_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/temazajilib/jfv9wja/best_country_music_songs_2019.pdfIn PDF document text
    • http://vujumitadasedi.22web.org/nedaligamuvumuniku.pdfIn PDF document text
    • http://stalekost.site/tobipijunaxodfz2p.pdfIn PDF document text
    • https://cdn.sqhk.co/muzexeragod/SPdgdIn/siberian_cat_price_in_usa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_6026608dc663c.pdfIn PDF document text
    • http://vamekujo.66ghz.com/taxi_driver_songs_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484156/normal_602c231b7906e.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/fGg4p8q/kinamoxedomedisusatax.pdfIn PDF document text
    • http://vash-fasad.live/12934035730yyiz6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jakujakula/xovesuwafotoduxesodi.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/broken_arrow_full_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/29841987540.pdfIn PDF document text
    • http://roraxekabitapoz.rf.gd/webroot_antivirus_android_review.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/nosofijozebegiro.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/85806550191.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67D 5956 bytes
SHA-256: 2566d8a1353fa26e29eb2529e5e2aabb4a9ca891a7434c4d4962dd2368560c84
font_01_sfnt_off00010aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA1 10596 bytes
SHA-256: c7b76837048553dcfa35e46d5faed006bd0c591bc448b7e98577f4857aa07adf

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