Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4976853ed52587…

MALICIOUS

PDF

87.0 KB Created: 2021-04-07 20:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa6decfb551a04d0e6cba3042b4dfbe6 SHA-1: e225c5dba1ce1a7d96e06c5ee232de663746e71a SHA-256: 2b4976853ed52587ec77110016c74b49afd3edd6953d25e843b8a66b361867f7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including a link farm heuristic, suggesting an attempt to drive traffic to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-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://maypoin.ru/wix?keyword=bed+bath+and+beyond+ironing+board+cover
    • https://fusewire.weebly.com/uploads/1/3/0/7/130776481/5b681ae9d0191d.pdf
    • http://obuv-kozha.ru/the_mortal_instruments_city_of_bones_2013_dual_audio_hindi_720pxjqf5.pdf
    • https://duvirimak.weebly.com/uploads/1/3/4/6/134603536/rofedakidoto_nudiwiji_bobomajuwusenig_batudovuviv.pdf
    • http://kenugizi.getenjoyment.net/what_city_is_babylon_today.pdf
    • http://idealslimitalia-oficial.site/murder_mystery_murder_mystery_codes473bf.pdf
    • http://vorecan.space/fabezemitzdhgr.pdf
    • http://buylettersonline.com/kuta_software_infinite_algebra_2_radicals_and_rational_exponents_answers3qjv9.pdf
    • http://kedugobepuged.mywebcommunity.org/la_boite_a_merveille_complet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://teropisarazo.myartsonline.com/tibebe.pdf
    • http://fadudenomo.onlinewebshop.net/beanie_pattern.pdf
    • https://s3.amazonaws.com/ziwuvijevo/jefedi.pdf
    • https://s3.amazonaws.com/pewebopufupe/degekuronapodexagorogogon.pdf
    • https://s3.amazonaws.com/xopugup/38979564330.pdf
    • https://s3.amazonaws.com/xufaxoferugod/84819058649.pdf
    • https://s3.amazonaws.com/lekelepowo/67573307517.pdf
    • http://zodejewab.epizy.com/vikram_aishwarya_rai_song.pdf
    • https://s3.amazonaws.com/woxewiwupir/fantastic_beasts_and_where_to_find_them_2_wikipedia.pdf
    • https://s3.amazonaws.com/gofilafixu/zemexifawigafuwuj.pdf
    • https://s3.amazonaws.com/girilifawuxi/midumefufipipemizul.pdf
    • http://fenulujexita.epizy.com/evenflo_sonus_65_convertible_car_seat_installation.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_off0000f27f.bin
14176c8bcf9261095409b05bd1f6862355dead5c07338b84162cc428cee62cf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF27F 5128 bytes
font_01_sfnt_off000103f0.bin
180733af6472b6a658ad023b1d4bd40ccd3b8d52cb0d592c6396428f963d9710		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103F0 11372 bytes
font_02_sfnt_off00012acf.bin
ac5d9198e9e5788e2012a92f79ae3d93b0172fa872ff4df9b6836d0aaa1540d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACF 16232 bytes
font_03_sfnt_off00014028.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14028 4324 bytes

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