Malicious PDF — malware analysis report

Static analysis result for SHA-256 232c6a18e53df258…

MALICIOUS

PDF

76.3 KB Created: 2021-03-20 14:03:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d29efeb649ce31dd0232978c48b8ea01 SHA-1: 1f6084af117da89feeadb380e469a30fe75e904f SHA-256: 232c6a18e53df25859bf6ebbfdea3d2189900dc71c2f5b1e48a8c62600933ed1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics further confirm the malicious nature of the file. The embedded URLs suggest an attempt to redirect users to phishing or malware download sites, aligning with the 'Spearphishing Attachment' and 'Ingress Tool Transfer' techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8796

Heuristics 4

  • 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
  • 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/award?keyword=cdma+in+mobile+communication+pdf
    • https://dobidikomopal.weebly.com/uploads/1/3/5/3/135302797/setazog.pdf
    • https://lisajakuxateril.weebly.com/uploads/1/3/4/3/134349263/4810046.pdf
    • https://labajilawuja.weebly.com/uploads/1/3/1/4/131406369/8563281.pdf
    • https://static.s123-cdn-static.com/uploads/4388422/normal_5febb747b40cc.pdf
    • https://cdn-cms.f-static.net/uploads/4476122/normal_5fe792c0ec67e.pdf
    • https://getezulesu.weebly.com/uploads/1/3/1/0/131071231/besoz.pdf
    • https://static.s123-cdn-static.com/uploads/4448129/normal_5fc5a4117f98f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ruzumeb/scooter_repair_brooklyn.pdf
    • https://s3.amazonaws.com/kefiperizonofu/ribonijakupose.pdf
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_eb959152d2d94212a2fa6183678c0296.pdf?index=true
    • https://7ed754b6-a209-4558-9281-0032c7ee8ade.filesusr.com/ugd/4329d7_de9b1fd4dc87493dad5b3cced7d58671.pdf?index=true
    • https://s3.amazonaws.com/levumoduf/sovusakajetovusime.pdf
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_13e30a8ab9e84499933493e777f783b7.pdf?index=true
    • https://9a4203bb-6ff2-4ef1-9c63-3f113f84a884.filesusr.com/ugd/ea9bdf_436b29b7d6404996abf6dac945bc4234.pdf?index=true
    • https://s3.amazonaws.com/fatikonavori/sololearn_html_answers.pdf
    • https://10bc5e17-7652-4c7e-9b43-999b3eb3b021.filesusr.com/ugd/5edc69_c555d1a9fcdc4d2b9d348e926145ea16.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4ce3c8a7-60e0-4498-9236-2b76299e36f3/82824310789.pdf
    • https://s3.amazonaws.com/zazelujeju/42686977566.pdf
    • https://4dd4a32c-aced-41d2-87e6-7ff9ca8080d7.filesusr.com/ugd/6d6f33_72cdf8a7d4724d17aa15ca295608ed04.pdf?index=true
    • https://26bfc7ce-baa4-43a1-9280-72312523cbd3.filesusr.com/ugd/5af86b_b4a8fe84284f4508a8e9563f31941e30.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cb1f26e6-cce0-4f5b-8f5c-f398777ea934/my_neck_hurts_when_i_look_up_and_down.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001248e.bin
5788f2f9ad1b3218e1cd5fd1bd4d10ae7c8a28997435ab80b52d997686c3ca20
pdf-font-stream PDF embedded font (sfnt) at offset 0x1248E 5072 bytes