Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a06944f19454f6a…

MALICIOUS

PDF

46.9 KB Created: 2021-09-08 15:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 85e26266eb569ed6fec2ec0cb8d6a0b7 SHA-1: f5c5a353f1d3c89a59cbebbb9b5d2e0a13d70b67 SHA-256: 9a06944f19454f6a0820c32546352860f01e6f5c06660a624654f45afb7468d2
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating it's designed to redirect users to potentially malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic of using numerous disposable domains for link distribution. The ML classifier and ClamAV detection strongly support its malicious nature, likely as a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7471

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=robert+browning+my+last+duchess+pdf PDF link annotation
    • http://pi-consulting.ch/download/59876419294.pdfIn PDF document text
    • http://timocomputer.cz/files/file/72917301175.pdfIn PDF document text
    • http://baharev76.ru/userfiles/file/kesifelekojisikaker.pdfIn PDF document text
    • http://air-ned.com/uploads/files/13067678014.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/ponarejevobopijisulu.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/30780076412.pdfIn PDF document text
    • http://www.hro.ait.ac.th/js/ckfinder/userfiles/files/87788656967.pdfIn PDF document text
    • http://tainanrup.longi.tw/uploadfiles/files/20210903_150024_3836.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/40240971604.pdfIn PDF document text
    • http://tucholainfo.pl/userfiles/file/10062498366.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/sokudis.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/lijino.pdfIn PDF document text
    • http://safarekhoob.ir/basefile/safarekhoobir/files/dopupiruwusavagogasafo.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/soverikedajuzotamizegewa.pdfIn PDF document text
    • http://zenkatsu.dk/files/39808634307.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///98649715547.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/20027157444.pdfIn PDF document text
    • https://h1t-urlaurora1-turbo.com/contents/files/xadaji.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/loloxiwupijotekix.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/zekote.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/21727440480.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/finimapop.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/xakunonulukewe.pdfIn PDF document text
    • https://zniczekowalczyk.com/user_images/file/gonowijabuwu.pdfIn PDF document text

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