Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9cddd5640fbd35b…

MALICIOUS

PDF

102.3 KB Created: 2021-03-14 22:23:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4ad4df262e626895c527481f050098d SHA-1: a80445fef49a2a9a6a495c08362a06bcd4aef2f8 SHA-256: f9cddd5640fbd35b2dd528935c75b64b2edfbc022fa90163083c60698a8b99c0
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of embedded external links, a common tactic for phishing or directing users to exploit kits. The presence of these links suggests the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=how+to+adjust+chain+oiler+on+stihl+ms171
    • https://cdn.sqhk.co/fegibidizog/biinfie/rarazutomeborunowivamev.pdf
    • https://cdn.sqhk.co/zururodi/hUBgdgj/sexulakakotujewezosexofa.pdf
    • https://cdn.sqhk.co/tipefima/jbbhgge/96011085416.pdf
    • https://cdn.sqhk.co/pekotegafod/hb4icK4/35234610894.pdf
    • https://cdn.sqhk.co/nobukomorur/gggllgj/87798188754.pdf
    • https://cdn.sqhk.co/mogudekusab/jiejdib/48265806980.pdf
    • https://cdn.sqhk.co/xuxiropuwomo/jUjfjf4/95977523157.pdf
    • https://cdn.sqhk.co/gujowaxexag/jhcXibb/sonic_coloring_book_app.pdf
    • https://cdn.sqhk.co/potonefamuve/hijejbt/is_sure_shot_promotions_legit.pdf
    • https://cdn.sqhk.co/bamazaludez/sihfHk8/elements_of_art_shape_drawings.pdf
    • https://cdn.sqhk.co/zavilisuga/hggjji3/my_talking_tom_friends_apk_cheat.pdf
    • https://cdn.sqhk.co/tevosenijosu/ia8jegg/44712326257.pdf
    • https://cdn.sqhk.co/nogawevorus/hhicic5/nunadoso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_664e6500f3b6418fb3456b6adc121224.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1014bf54-691a-4862-8108-3bf1bcfb3f7c/poulan_pro_gas_blower_vacuum_ppbv25.pdf
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_333dcc9cad8d4d5596e93dffec5da984.pdf?index=true
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_9c6ee96dd53546ecb86fbc851f877618.pdf?index=true
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_e5b029f02f2e496ea1917d8e98bec80d.pdf?index=true
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_dacee7fcd16847bb8473c6ce72c08f1f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f9c12c8d-e3ab-49f8-a8c3-0d2d30dcb42a/windows_10_pro_free_download_with_crack.pdf
    • https://uploads.strikinglycdn.com/files/7109cc01-112e-4496-a4d2-e00ff7bb2adc/boriripurididovibijapu.pdf
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_c7c88b8a618545a6a4446ab9ee2d21b5.pdf?index=true
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_17b2d345667d4a059a3db1c12cbd0fb3.pdf?index=true
    • 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_off00014d31.bin
0e080beb8bf6079969470edca8c9eebadc1b86d94d1d50a5e2b7484cb21b215e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D31 5440 bytes
font_01_sfnt_off00015fa2.bin
9125a05a4b4fd1045edd6ba3fa9fbdfec25c471b3397cc2278603f8366064761		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15FA2 13648 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.