Malicious PDF — malware analysis report

Static analysis result for SHA-256 509253ee2376a27f…

MALICIOUS

PDF

85.8 KB Created: 2021-06-28 05:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ba52327cde46573dd86f96a019b0415d SHA-1: fccfe535676811303b9c846c045f7e676cea6731 SHA-256: 509253ee2376a27fc7332d218031282a5b2f856ff8dd077d6c4fec35d3f42c9b
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The document body is unreadable, but the presence of numerous URLs, many hosted on compromised or disposable domains, strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/5bf700c373d04dfde1995aab773f7092/13730116501.pdf In PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/b7024980a986ed7dc7a8c0610abba941/xisud.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2ada8b603---pukigimax.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/losopaxo.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b72a3911a26---29988672168.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080dd1e13cf1---vowisik.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/n0h9v7v14ung0mcabpao60qn99/10162506878.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/776b70a06a16a6f155fb3b7a13a47cca/dudogisezugud.pdfIn PDF document text
    • http://owtsreunion.com/clients/e/e7/e717deb27d844c69ffc49b2d3c0bb1a5/File/vejit.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf40805ab4---9641948172.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cb1dfee2892---kalagubinu.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/nifixufafon.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a96f6504529---63769104303.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/kefixabekobu.pdfIn PDF document text
    • https://afayl.com/userfiles/file/gefosikunojetigu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea4c05d67b---51173699328.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/kemesefojujepuvafezumele.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743e825556a---miwuwupaleguwa.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/7028c29e65c19dc982381385d9d7594b/xizelupakinap.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/80232797588.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/62038704891.pdfIn PDF document text
    • http://herve-coiffure.ci/files/97409281535.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/2257476151.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=answer+the+question+why+do+you+want+to+work+herePDF 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_off0000ea8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8D 17004 bytes
SHA-256: 253be3a392c05d22e378dcc34628c35ebff1ec21095da6709acdbfd2c8313b6c
font_01_sfnt_off000116db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DB 10820 bytes
SHA-256: 98c0ded9e636dd1bc9e5f71f851b63122ddb94a41b1d04b19225bde28a736c36
font_02_sfnt_off00012fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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