Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd5545a0f6618f4…

MALICIOUS

PDF

127.2 KB Created: 2021-07-03 04:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e5c210d01fb64ea60e7b16228fc3be31 SHA-1: 1dc1119b9d015757be8341ddb0106a85c9167d9c SHA-256: bbd5545a0f6618f4e652664820f47f986cc4f535ff976e3d18c60abef2db80ed
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to external websites, some of which are hosted on compromised WordPress installations. This suggests the PDF is likely used to redirect users to phishing sites or other malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://kimwendelldesign.com/ckfinder/userfiles/files/53679080670.pdf In PDF document text
    • http://nutronicltd.com/userfiles/file/39306024446.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/12508955638.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__60DC0C81E3320.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/tatunoxesalaji.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/geganuwosiboraliri.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/64050910039.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db047fef85f---guweketoxiweno.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/9d035a8d22a74f40464930867c047c99/41132974285.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b37055ebd---rafowujukuzonukupidi.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/nobisuwij.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fed4d034d---poleposesarinawobuvosod.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/60145771594.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9b22ba897---12887605911.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a047b09eb24---pudamaretozelamek.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/4c255cb0152ea52888280ead8f5713c7/26696761217.pdfIn PDF document text
    • http://atek-ent.com/upload/file/19136448999.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/nuzowekivafija.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6bb432579---47053168309.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021050318495848.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=i+would+recommendPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/20a6000494896c4ac82e5a28928b630e/jagopokorepugamubufulib.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_off0001960b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1960B 16532 bytes
SHA-256: d91b0af119264ac411caceaf47f047ff6b65d00f461b37387d8f7bf6ba4fade4
font_01_sfnt_off0001c110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C110 10148 bytes
SHA-256: 0e79aa719614109a05dae83c3d2aa9c92b3042345a63d2b1024f58320ecddb66
font_02_sfnt_off0001d7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D7BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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