Malicious PDF — malware analysis report

Static analysis result for SHA-256 695ea071e2373b4d…

MALICIOUS

PDF

79.0 KB Created: 2021-09-08 00:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: acc2812900f95d83df6c0c871c30f02c SHA-1: 015cadc9a7d0f04d91fb1c9b5710c14802dbaad6 SHA-256: 695ea071e2373b4d48602ccfe466447928a4cc1f79adf53e60974b3400d1a4aa
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The file contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns are consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nationalshield-uae.com/userfiles/files/44846987024.pdf In PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a40455d9ecc---59296845275.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d972e613d3---57625595312.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16096f6367101c---govovajakaviralatit.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/48903058902.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/60685611928.pdfIn PDF document text
    • http://d2dgroup.net/upload/files/sefifigitapuz.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/xefokokilomomo.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/a1aagssqs51cglv3ci5an4numq/46604985889.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/5b363b3ce84a5a3895aa56d8a7644f8d/41148102382.pdfIn PDF document text
    • http://thamdinhgiadaiquang.com/img/files/49651425820.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612461330d2dd---57795889063.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/52205071351.pdfIn PDF document text
    • http://insk.ru/img/userfiles/file/75168560340.pdfIn PDF document text
    • https://digicpictures.com/downloads/pulimuxagetufedavaraxuxep.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160fa79ccf313e---31676357530.pdfIn PDF document text
    • http://mobilenmr.com/files/files/56104775511.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/318acfd7e7abc8d79c64982b3cd87027/72176447637.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/xefoxenuvuniwixawaz.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/narolegoxadutumexezitel.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7c19b6b65---95545896130.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160d30ec775806---takepidupogurozijux.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/qsd794f0retnh998embccirlf7/tutixasonepuwadu.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/fil4l403uaruckutdmad20a0qc/9105071854.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=acs800-04+service+manualPDF 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_off0000cf89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF89 10764 bytes
SHA-256: 3b745617b30b1bad91ca38619d2e9440183aec8a183f3700ca643012a44febd7
font_01_sfnt_off0000e863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE863 17688 bytes
SHA-256: 340901d678d3b2017cc8bcb06c9e7ceac8b193fd5278c175ffabd1fb6b3ceed2
font_02_sfnt_off0001168f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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