Malicious PDF — malware analysis report

Static analysis result for SHA-256 6119716c0f99c509…

MALICIOUS

PDF

72.1 KB Created: 2021-02-13 09:12:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 47650ccf4cbcb32b8e039772da4e7262 SHA-1: f874b6ad5548b0a63ef06ee45532bab03237e4a1 SHA-256: 6119716c0f99c50928217e5b8171c88a5878a23106bbda6e1da3be087d980882
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to 'happy birthday sister images with cats', aiming to trick users into clicking the malicious link. No scripts were extracted, but the presence of external URIs and high detection scores indicate a phishing or malware distribution attempt.

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://jottigo.ru/123?utm_term=happy+birthday+sister+images+with+cats PDF link annotation
    • http://twirlini.com/tilegaxinue0u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454047/normal_601f6713812d3.pdfIn PDF document text
    • http://afracheat3.xyz/nadaxetumasoridodusepgtd0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501486/normal_5fcdcc4729c40.pdfIn PDF document text
    • http://kindraretterath.com/60591223897ozi9i.pdfIn PDF document text
    • http://pristav.pro/74393001242azwrg.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/dijghhg/30841557060.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421934/normal_5fdf2b3dccd43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403422/normal_5fc8f92fbd545.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471488/normal_5fec38afe9c25.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/gomaxod/moto_g5_s_plus_android_9_update.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/robin_hood_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/mobugewidote.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/percent_fraction_calculator_simplest_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/ayyappa_swamy_ringtones_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/24338553358.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/fuzujimijitunezir.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_off0000da96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA96 5752 bytes
SHA-256: e26691ae95925f8f1c0f8978b242e709f82cbdd288eca6c92c931d387288e78d
font_01_sfnt_off0000ee13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE13 11076 bytes
SHA-256: fe0c822a801051404e2aeccc599b27ea3f997ea84e75ad858ba7301b638d13e8

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