Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f03d36e9e3d672f…

MALICIOUS

PDF

95.1 KB Created: 2021-08-14 10:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b52e1d9ace7e3c20bfc4bd64b7c96d53 SHA-1: 27ee1a40d1a08cdf0a26f65b894e323b4c5dd64a SHA-256: 2f03d36e9e3d672f2820297090ea9222996e0f3758a3d4081fa91c962e7546a9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to lure users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://smidgel.ru/uplcv?utm_term=bajirao+mastani+full+movie+free+eng+sub PDF link annotation
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baafc10d5b1---dutadudazolirituwurej.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4683e64b3---zilazunaxene.pdfIn PDF document text
    • http://anysoldierfundraiser.com/clients/a/af/af293656121fcb8b60a8c910089dd81c/File/6643529713.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/b7e626ec8d41878334b3011d5bce6a12/30922983848.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/50766272221.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610e933bb309f---23025153123.pdfIn PDF document text
    • http://physocare.com/Images_upload/files/41109767587.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/4b9b0c22121f08cb859c91138ed79045/gowekojiw.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cd5aef59d---35205041922.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a84d48041aa---33980874292.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d1e2daab9---70979144292.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071eb0de0194---25369765178.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/93587277828.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/dupigonetusexelifeparo.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607caf9d57a56---wofifukuvebekoped.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f59dda44af3---37031725677.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/vqiu6scdv8rgmaesregfl4dfc0/vaxeriruvojaliwetogigig.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/eeh7m6oc28j7g194a60ic8lfj5/91394808129.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/f06a525d39e068631941cf07ee7747a0/2634741107.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5a7b45fd7---korajudixuzogavexo.pdfIn PDF document text
    • https://alutat.com/data/file/39350768368.pdfIn PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/zugejidigazajur.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/d6a75b79393288815b3da079509d7019/xajemodojinupowoma.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/56986c51e6b0ec5bca1df4fb73e679b1/28916724927.pdfIn PDF document text
    • 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_off00010e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E38 11044 bytes
SHA-256: c335f1a82f7cec895a03d4b758a9a11ed65aed549ddd26f82d2988571cd86a00
font_01_sfnt_off000127f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14008 17440 bytes
SHA-256: b9e24941735c33614b2ca6e643d1e4b9e368ac356dc5163f406fe31f2c4e1f27

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