Malicious PDF — malware analysis report

Static analysis result for SHA-256 382e9d2909330086…

MALICIOUS

PDF

83.5 KB Created: 2021-10-07 02:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 388928815d2931b80c12b8c45d2de239 SHA-1: 119352f5eb16d46b090532100e4511d702acff98 SHA-256: 382e9d29093300860d3b213238425cb86de1ba08b7db9a7c605e180dd9f4bbb1
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The document body is unreadable, but the heuristics indicate a focus on directing users to potentially malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/acaefeae03222ef1fb9625665d8091c2/nejamajerikosojowus.pdf In PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/161479bbdd20e1---91804094576.pdfIn PDF document text
    • https://tomas-music.com/contents/files/kemilipopozen.pdfIn PDF document text
    • http://speckrepej.com/upload/file/84252753947.pdfIn PDF document text
    • http://optykglowacki.pl/obrazki/files/43079258457.pdfIn PDF document text
    • http://potlista.com/file/files/18159271408.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/xuzafivevutuwikop.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/33348405243.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/xawizevetozofa.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/59888975192.pdfIn PDF document text
    • http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/15959445999.pdfIn PDF document text
    • https://flying-vikings.net/UserFiles/file/fefepugumuxutolusamuziget.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/fawabekiba.pdfIn PDF document text
    • http://barahi.com/assets/userfiles/files/viwatidule.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614ede670116b---50285521293.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/ritataje.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/sunafezewaxetotogidaru.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/93019352474.pdfIn PDF document text
    • https://ghnservizi.com/file/47074190807.pdfIn PDF document text
    • http://swvocal.com/data/se2/file/lefipalobokotako.pdfIn PDF document text
    • http://addisonplaza.abwingsmd.com/uploads/files/pavam.pdfIn PDF document text
    • http://chemtron-vostok.ru/media/file/69386040837.pdfIn PDF document text
    • http://freewest.at/55607143191.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615951f2a407d---ropakefazadatifaxez.pdfIn PDF document text
    • https://gsacademy.ge/uploads/files/jisaximepemonoboja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=non+controlling+interest+financial+statementsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ded9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED9 10656 bytes
SHA-256: d071f94ffbee242653ead89b846c9fbbfd8683b8f64c03bb87d8ff77a4430e22
font_01_sfnt_off0000f743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF743 18652 bytes
SHA-256: 622a0dcbb216eeb39cc9e4d95d0c93b7178c68f387c3af2ebacf4f0d3810946c
font_02_sfnt_off000127ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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