Malicious PDF — malware analysis report

Static analysis result for SHA-256 195ef81bf7ab8306…

MALICIOUS

PDF

70.7 KB Created: 2021-06-09 15:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c1acf4e3efd9cb4b456ff899bcd53d5e SHA-1: bd6fd2198528de43755dac8ddc42202e11d2cf90 SHA-256: 195ef81bf7ab830647a32b92933d7261c28dba2d99103976e05ea03166a1ae96
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5153

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://smidgel.ru/pbw?utm_term=windows+7+ultimate+genuine+product+key PDF link annotation
    • https://tofisijola.weebly.com/uploads/1/3/4/8/134863845/9142482.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502436/normal_5feb1830be8a6.pdfIn PDF document text
    • https://velebipuzufal.weebly.com/uploads/1/3/4/4/134434208/0d9be35ae4.pdfIn PDF document text
    • https://gozajajemitala.weebly.com/uploads/1/3/4/3/134325553/2596352.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5fd1e1dc9c047.pdfIn PDF document text
    • https://xudufuzed.weebly.com/uploads/1/3/0/8/130815664/6409bdf497f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371240/normal_601ac05181545.pdfIn PDF document text
    • https://dirujewe.weebly.com/uploads/1/3/4/6/134677456/4334405.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413125/normal_6021956937bce.pdfIn PDF document text
    • https://mofizuzu.weebly.com/uploads/1/3/4/3/134316779/bibedifasex_jopebir_pidejumudame_pesezubaraduw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409411/normal_5fe972ed0cc6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411500/normal_60bfb095d8e33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417205/normal_604940340d3f0.pdfIn PDF document text
    • https://jelisewisu.weebly.com/uploads/1/3/1/4/131410299/7216715.pdfIn PDF document text
    • https://lekibuwowobaveg.weebly.com/uploads/1/3/5/2/135295955/1014256.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416136/normal_602a7c3068da4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408482/normal_605a21c10ab8a.pdfIn PDF document text
    • https://bijuxoku.weebly.com/uploads/1/3/4/9/134901677/6471447.pdfIn PDF document text
    • https://xoxomedeze.weebly.com/uploads/1/3/5/3/135308121/dupifipobimew.pdfIn PDF document text
    • https://jiwazakamofefuf.weebly.com/uploads/1/3/4/0/134041011/bafanititex-rasupesine.pdfIn PDF document text
    • https://mepanegeloja.weebly.com/uploads/1/3/4/7/134759112/3519339.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/83a6ea99-5595-4288-8c92-6ea3cee827ba/32167124054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec10afb3-6edc-4c59-afe0-33a07b323063/audi_s4_avant_2020_occasion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a7e5361-a5b7-4bd1-996c-cd47a0d37c94/where_did_they_film_jason_and_the_argonauts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd0434af-e9ee-4d62-85d0-565d859daf29/9784821800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/308c931c-fbab-4aed-a6d2-3720707f3c40/15929876417.pdfIn 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_off0000edf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF9 5744 bytes
SHA-256: bf8e48f1fadcc560f1fe52325d2f7d745ea239ba6d436be3fada858d255e18a7

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