Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ddb822f962747ba…

MALICIOUS

PDF

67.6 KB Created: 2021-03-23 00:53:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b280376e7434b1cc2915dd95f7a5db63 SHA-1: 7ef5167360fee218fd2da0fed836c7527fafe11e SHA-256: 5ddb822f962747baf8474ceab7ae731f95aac82913fab82c9ee3cc142568d233
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as a link farm and a potential phishing or trojan delivery mechanism. The ClamAV detection and ML classifier further support its malicious nature. The document contains numerous external links, many hosted on disposable domains, suggesting an attempt to manipulate search engine results or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/aws?utm_term=one+punch+man+season+2+all+characters PDF link annotation
    • http://bagerisevi.scienceontheweb.net/why_did_graystripe_leave_thunderclan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457570/normal_5ff2d28e85965.pdfIn PDF document text
    • https://damobupakul.weebly.com/uploads/1/3/1/4/131453350/27c2012.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/how_to_use_proctor_silex_10_cup_coffee_maker.pdfIn PDF document text
    • https://dezilitew.weebly.com/uploads/1/3/4/7/134728488/5065186.pdfIn PDF document text
    • https://dapazigozasonim.weebly.com/uploads/1/3/4/4/134466252/8858814.pdfIn PDF document text
    • http://lawexape.mygamesonline.org/69062368933.pdfIn PDF document text
    • https://mujabimebedegi.weebly.com/uploads/1/3/4/2/134234846/8587525.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459914/normal_5fe89ecbbe9b3.pdfIn PDF document text
    • http://zatoxuvisovapuf.sportsontheweb.net/what_is_the_screwtape_letters_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471091/normal_603f0e1aebdd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5fd2aceab1e63.pdfIn PDF document text
    • https://jalebipozufi.weebly.com/uploads/1/3/5/3/135320073/mipazupafizenumef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d6d78a-56f8-40fd-b0a9-c1f845b2800c/kumin.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/autodwg_dwg_to_converter_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aec2d245-49ff-4eac-a67c-e93acbf25448/their_eyes_were_watching_god_literature_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/massachusetts_driver_s_permit_test_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/how_to_read_welding_blueprints.pdfIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_01230194a830457db8e2b30397e7877f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b16b79-d525-4901-a330-2d56c04e7a4a/32035428240.pdfIn PDF document text
    • https://6dca1d0c-b102-4aa4-a312-d013f97c39dd.filesusr.com/ugd/fb87fb_a6067c34f4b64b06b29990eaebb88ed3.pdf?index=trueIn PDF document text
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_6ded4aa9dd1b4cfab873cd22740800fd.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC99 5332 bytes
SHA-256: 83b80b810e04b74a2c92e8d84e34ed096c1ded02848320762c22b17ac9073069

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