Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b467ce2994bc734…

MALICIOUS

PDF

79.8 KB Created: 2021-09-07 21:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2ae485a715083cd7b514ff8b768ab11e SHA-1: 38580b583e7203637d040dc9bd5ddaf854e00ea5 SHA-256: 9b467ce2994bc7345be637552f876eebf89d56879471dcf812f3661a14ee54d3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://laiksmodalux.lt/app/webroot/uploads/userfiles/files/50791741597.pdf In PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3bea0fa3e---71511989255.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/d7fkio8685vbas1vahourgbc3o/87607462635.pdfIn PDF document text
    • http://voijin.com/userfiles/files/nofedul.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/85844087059.pdfIn PDF document text
    • https://bestwaynepaltrek.com/ckfinder/userfiles/files/42444595310.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ebc3466f9---89489300574.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/b53iq40cuh9v6qkd9924nsdifq/zifad.pdfIn PDF document text
    • http://sjhtractor.com/d/files/73417784828.pdfIn PDF document text
    • http://asfalon.com/__files/file/66539612912.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/redenavotaduretagemonepaf.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/80984205135.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/75644022196.pdfIn PDF document text
    • https://mimpishiodua.com/contents//files/kikiperejuv.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849858e05b3---37470129936.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/2o62s1pb9m4n7ibkj2h8rn1de9/pujibabatesefifokix.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/60024726123.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/85787653699.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021071819512473499.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/ribusorekuzutof.pdfIn PDF document text
    • https://fengshan-zhennangong.org/upload/ckfinder/files/kaferaxosozasiw.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/161012b8f1e6c8---vofizezusedadujikala.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ac819043b06---25846162271.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=manual+data+entry+input+devicesPDF link annotation
    • https://lapdonline.org/file/9847750490.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_off0000d618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD618 10660 bytes
SHA-256: afa384abb296bfbc94abe7c20aa1d32452701622b0f7fa08719d5a83f67723ac
font_01_sfnt_off0000eea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA3 16776 bytes
SHA-256: a4fae0ba8f95c1fc1cbd38e8fe44702a069e548a758f6fc9e1facc176ca6879e
font_02_sfnt_off000119ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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