Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b52eafcb60a254b…

MALICIOUS

PDF

85.7 KB Created: 2021-07-19 08:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 63043ab978b2c370e4520663cad83a9d SHA-1: 52a189c8ad1349ae1a72c9df77d5ed7393f7c477 SHA-256: 0b52eafcb60a254bb8ac6518709221fe8378a2a506ede04f2f15d42d721c26f9
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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://abimobiliare.pl/pliki/File/xabukipawetewexex.pdf In PDF document text
    • http://fouladsazanco.com/Upload/file/nijaguxarepinusigoman.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160834d0d426d0---majipabowez.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/53080863753.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/485aa5c362a2e7c26df1c9401c724998/45193763733.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/84419311051.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/1547023108.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16082eb1db3add---salibunuborubebo.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/xekuwelamazevikonu.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0e1380606---48582199025.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/42896851541.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/xopifibupelugujotokexel.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16085063315e79---77013560436.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/84336541759.pdfIn PDF document text
    • https://bor-diing.com/upload/files/54435817073.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/63332797029.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/ladiwekizebajus.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/95180242529.pdfIn PDF document text
    • https://balarampurblock.in/ckfinder/userfiles/files/66964393017.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/pivoxitelak.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1606f520ec9a70---15063155094.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/94533694645.pdfIn PDF document text
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/10587974170.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b34aab17b0a---naxeragedutawipanuzujakit.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d72107e5bc1---58301112441.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/radirubadomusum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+use+elytra+in+minecraft+betaPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF4 10928 bytes
SHA-256: 0b5ff1843acdc770bddb530d3dfacc1e991f3d5624e74401fa0629ee3caad049
font_02_sfnt_off00010454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10454 18056 bytes
SHA-256: 55f91067afe6837e802fba15eed95e9a8eefc0d0e8f34a7437d8adbfaf761429
font_03_sfnt_off00013346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13346 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd

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