Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bac16e4802171e0…

MALICIOUS

PDF

81.5 KB Created: 2021-03-21 05:19:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d889e59b2d4497088ef74f3b2beec30 SHA-1: d618f24a4176d8afb2bfb5f3a3f662fbe858b170 SHA-256: 2bac16e4802171e022dc8ffe5bb6971b5d2b73843ac8715a479b9dd5351a3ec7
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, suggesting it is part of an SEO spam or phishing campaign designed to drive traffic to malicious websites. The embedded URLs and the PDF structure point towards techniques used to obfuscate malicious content and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/wix?keyword=skullcandy+jib+wireless+pairing+problem
    • https://cdn.sqhk.co/lenufetimop/8NSJVha/66742363377.pdf
    • http://limezage.scienceontheweb.net/pefetusomifemolavofaf.pdf
    • https://cdn.sqhk.co/jivazufevi/io1MWpm/fomuse.pdf
    • https://cdn.sqhk.co/wenewojufaj/anQVijk/download_ninja_vs_zombie_mod_apk.pdf
    • http://ketadiets.site/sotutugilakarubuhwdfa.pdf
    • http://pakawuwujawo.getenjoyment.net/nike_air_force_1_white_price_in_kenya.pdf
    • http://rekijiwowak.scienceontheweb.net/where_does_mr._inbetween_take_place.pdf
    • http://hyipinvest.site/accu-chek_aviva_connect_manual960hy.pdf
    • http://tiktokcopyrighthelpteam.com/appcake_ios_1262vi9.pdf
    • http://osmosiotzs.fun/3217529717rgpxn.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fusozevukatamir.atwebpages.com/five_marketing_concepts.pdf
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_9a085257081f42029b057128c9100ede.pdf?index=true
    • https://aece7fbc-7072-4055-9cfa-29e0da41b620.filesusr.com/ugd/e878fd_a304118cb1c24a6d9f9dd34cfb5fd49f.pdf?index=true
    • https://s3.amazonaws.com/guwutivupudutu/what_is_relativity_of_simultaneity_time_dilation.pdf
    • https://8a89c5bc-485b-4808-980c-66c60e8d9908.filesusr.com/ugd/834936_5535cbf2da0343be8f70c438a5b4235d.pdf?index=true
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_95be78ae0e9f4831ad9e18022ad0ae14.pdf?index=true
    • https://s3.amazonaws.com/gekixadonuru/crysis_1_game_free_for_pc.pdf
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_137c85877a3c4ababdf10ab29137f5e3.pdf?index=true
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_540a1262c7d04939a7d976bba76736ce.pdf?index=true
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_ef6d7603e27c45d0a608b3f62d97708a.pdf?index=true
    • https://s3.amazonaws.com/sukedil/bradley_cooper_oscars_2019_performance.pdf
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_2f913f438c65481e9fb30b06ba07b6ea.pdf?index=true
    • https://s3.amazonaws.com/gifiz/french_days_of_the_week_worksheet_free.pdf
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_85aec0607b5f4a45ba634e8ab1f56e86.pdf?index=true
    • http://timojodabemisux.myartsonline.com/tupesov.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd9e.bin
b51904af6d3f3ab6688ecce3e74dce3aa37c72574e3de66a842b2c08a2d832cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9E 5972 bytes
font_01_sfnt_off000111f8.bin
26065d696066f3c049a37acee9ee019e1d2a0bbff438601fbec52e6e42d93853		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111F8 11364 bytes

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