Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b79d2f99c64e475…

MALICIOUS

PDF

103.6 KB Created: 2021-03-20 21:24:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c2a76370e6615a67d295d68220c06ec SHA-1: 3aa3aae25e58bb427d0d4a1a2f49d82d12e765d8 SHA-256: 0b79d2f99c64e4757c5725936b94285dbb882da086f3cdf56a72f5810ae6600d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The ClamAV detection further supports its malicious nature. The embedded URLs suggest an attempt to redirect users to phishing or malware-hosting sites, likely disguised as search results or benign documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/strik?utm_term=everglow+piano+chords+pdf
    • http://changepass.online/99586896357jgtqm.pdf
    • http://helpcenter.business/juegos_cristianos_para_niosnqmg2.pdf
    • http://bosemefawixuwov.mypressonline.com/saxegojukunajisiwaw.pdf
    • http://tpdreport.com/65612118391gvuxz.pdf
    • http://pivojowemetobiv.mywebcommunity.org/juvarepasumobiloda.pdf
    • http://mosquito.codes/ncert_maths_book_class_10_in_gujarati3tmz8.pdf
    • http://maxirem.mygamesonline.org/20172736114.pdf
    • http://shopsupergood.site/propiedades_de_la_materia_cualitativasgom9c.pdf
    • http://sale20.site/68796326394it9jd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kotenu/3d_animation_maker_apk.pdf
    • https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_89311940e7c449789a95c9cd29a6fbc3.pdf?index=true
    • https://s3.amazonaws.com/liluvad/zen_mind_beginner_s_mind_book.pdf
    • https://s3.amazonaws.com/vitelitubovuluj/weapons_of_math_destruction_summary_chapter_8.pdf
    • https://05282879-aed3-4f16-ac14-d534add4d4bd.filesusr.com/ugd/0f8b7c_b9505022be30460992e52d955a7e0640.pdf?index=true
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_2ae7f82569bf4b7ba6f9bb98dccf70a6.pdf?index=true
    • http://taberadajip.atwebpages.com/48339102807.pdf
    • https://s3.amazonaws.com/wufujudisu/vabezukitajomewagepibes.pdf
    • http://fidalanono.myartsonline.com/45734930352.pdf
    • https://s3.amazonaws.com/woxotopapozokev/balance_of_payment_book.pdf
    • https://s3.amazonaws.com/zesotat/dabukagad.pdf
    • https://s3.amazonaws.com/wizuluworafid/the_birds_work_for_the_bourgeoisie_shirt_australia.pdf
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_a5d75304c2b94983a93334ea7c409cd5.pdf?index=true
    • https://s3.amazonaws.com/gagagakigibapo/jipigajarupinawujujemilo.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_off0000eb76.bin
dd0c77773375ba57fab0680b30af7222558361fb7217346002fc10849347af6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB76 27092 bytes
font_01_sfnt_off00013fb5.bin
2fb03ee6957df68e43ca556987fd09904c814f7b2a1de02523bd2a0778923e7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB5 5528 bytes
font_02_sfnt_off00015299.bin
4ea5565b8636f469ceb7eff314509e806cfd7205b5e4cbf7abbe9760b9d64312		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15299 11372 bytes
font_03_sfnt_off00017918.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17918 16204 bytes

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