Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e7ed55f178bb1b…

MALICIOUS

PDF

84.6 KB Created: 2021-07-04 09:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 457b37f026175cd25c923f6f8d614c11 SHA-1: af0489979e7fc395350a926c4c19d9ca00bde346 SHA-256: 07e7ed55f178bb1b782bf7fb16109bb4c92cefc9d684e51cf5f104204b3d4d6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The presence of these link farms suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://gulfcoolcontracting.com/uploads/userfiles/file/file/45837357344.pdf In PDF document text
    • https://sca-kc.net/scauserfiles/files/wesawobogajilexosimex.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4d49ae194---18770977826.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6dc339101---walatezasanorefis.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202106222156162063.pdfIn PDF document text
    • https://svrcontractors.com/wp-content/plugins/super-forms/uploads/php/files/fb54bbb198ecaab394905429a18aa836/dazabona.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/pabunapuziwepitofubeko.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/wuxesusomajumoge.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/903a20adde9fed11a9c75ad9e3767f6f/xeximibuwabi.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/41984808080.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/jk4uv28tk8omv2276s7q7rg80b/9110964404.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/7c11f7ce0ada4b7263bee64f9cdf6277/wesejowalonoxekomapitasu.pdfIn PDF document text
    • http://xn--d1achljw0b.xn--p1ai/content/upload/93421814937.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607a7aa005a97---xipaligiw.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/kusevevepulivi.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/0aaf26ebc0356f66915579a2a69c5438/nalata.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/nokasez.pdfIn PDF document text
    • https://bataretak.com/img/files/file/19552889670.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/1861638028.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/627334a29547ce7c442cee4b11a0b337/20230126554.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/jalibejitexaduf.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/qrt9nkmsn8gfl72fvq83blspg4/fumemidasutofo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=side+letter+template+docPDF 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_off0000e9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EF 16824 bytes
SHA-256: 188c44534f2cc58282e1126685569e47b95c8523f828b07c0bf04083e3911b0f
font_01_sfnt_off00011589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11589 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA0 10480 bytes
SHA-256: ff7e92eddfeb7abba03011e0af79523ba3f173c2c592c7ba7d7b6864f004f3f4

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