Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa57a5079c205d9…

MALICIOUS

PDF

90.4 KB Created: 2021-03-07 14:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6117a7824db92c74f7cf464257f97b53 SHA-1: e439c878a64f82bb27377ad04e11bf7f60ca05d5 SHA-256: 9fa57a5079c205d9153f452669069c1cbe534c68f9425a8c1573c3d1edf6a926
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, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the document's structure suggest it's designed to redirect users to malicious content, potentially leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://nipisod.ru/wix?keyword=pearson+geometry+textbook+chapter+6
    • https://cdn.sqhk.co/detatakev/hfgecid/xaleropozinalajaraboz.pdf
    • http://pshcomonhere.xyz/70694551891fu9hx.pdf
    • http://sanatoriy-izumrudny.ru/xijivozavowenuvebavaloddi4nu.pdf
    • https://cdn.sqhk.co/pobopuwubox/QXprhfs/planet_star_wars_battlefront_2.pdf
    • http://reactivaperu-2020.com/4628267827r9n3c.pdf
    • http://yblda.fun/tuzavelowofisiker200dr.pdf
    • https://cdn.sqhk.co/bomoxale/hgCf1if/nijukibala.pdf
    • https://cdn-cms.f-static.net/uploads/4450502/normal_6033d173cbe9e.pdf
    • https://static.s123-cdn-static.com/uploads/4410433/normal_5fcc7fd177841.pdf
    • https://cdn-cms.f-static.net/uploads/4412568/normal_6033dad38e601.pdf
    • http://fbcopyright-center.com/letra_himno_nacional_mexicano_completo_10_estrofasa9lbr.pdf
    • https://cdn-cms.f-static.net/uploads/4467287/normal_5fd67113d511f.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zufaxepixiguxax/the_wind_in_the_willows_book.pdf
    • https://s3.amazonaws.com/bibejovixapis/mekiginaxetixadof.pdf
    • https://s3.amazonaws.com/vovabagubajegeb/lonely_planet_armenia_free.pdf
    • https://s3.amazonaws.com/varolexexus/appy_pie_app_free.pdf
    • http://zujopafupo.epizy.com/33359036324.pdf
    • https://s3.amazonaws.com/pirosisob/polaroid_template_tumblr.pdf
    • http://gavojomizam.epizy.com/86244908049.pdf
    • http://sogefotatuledis.epizy.com/peabody_picture_vocabulary_test_sample_report.pdf
    • https://s3.amazonaws.com/zerepuzuze/mowisasokuzu.pdf
    • https://s3.amazonaws.com/nolarifaforuxop/jawotozezeregodi.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4da.bin
b2928d3c51072b313911efaf18bec5c26afb5f32a50a2789d8244288ec5afb82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DA 1804 bytes
font_01_sfnt_off0000fdb6.bin
6ba7a8395d77af89232180e77f270f3826581b1c420883910d68a4e83ec0c412		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB6 5844 bytes
font_02_sfnt_off0001117a.bin
ab1a74b52070125fcb3efdd4500c43c15cb53861bc36795008ad9113928b24b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1117A 2732 bytes
font_03_sfnt_off00011d44.bin
722bf5d5274da9f5c9c5c65da67dc3f9817cd21cc3cd335967a31e2724c6b3ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D44 10840 bytes
font_04_sfnt_off0001428b.bin
f68e4b4d42456b360743c7acf69c82a49aa063f25f521dd5c66d8c69e3fa217a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1428B 16436 bytes

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