Malicious PDF — malware analysis report

Static analysis result for SHA-256 6146170edab1addc…

MALICIOUS

PDF

97.0 KB Created: 2021-09-07 23:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e4f16eae2ddc7f5a0ea9d39c03ce8637 SHA-1: 6705f29777fc92f18afa2cef504c5aa30fd1724f SHA-256: 6146170edab1addc7922801d52a80c9c4011617fad4f8482c8352321eaa61206
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS upload directories, suggesting a link farm or phishing lure. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, indicates potential for exploitation or further payload delivery. The primary goal appears to be redirecting users to malicious or compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/eecfc3e98c7f3314e1999d068f28d8c9/naredolosavoxarasode.pdf In PDF document text
    • http://novafish.it/userfiles/files/82597537349.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/9i72gvmeihsrgk7hf6em8eb6vr/givaxukadubop.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/wuvuxivikamo.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/9956952408.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/powaluteli.pdfIn PDF document text
    • https://drsaman.com/files/21097763054.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/befesivewovazuv.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608789b7bac06---69034329010.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/titubugula.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ed59ef8a9bb---77601326524.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa749196eb3---23505160987.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210719_71FA338A15DDFBF3.pdfIn PDF document text
    • http://bjjiffy.com/upload/5464981685.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/tuvagujefatuwajig.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/mudokonigovobonijiwudanu.pdfIn PDF document text
    • https://pubs-icfas.org/icfas_new/dev/ckfinder/userfiles/files/donevet.pdfIn PDF document text
    • https://deepex.hu/hirek/files/tegugiwufadopozote.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/68f1c5e605bf816be61cf9ccfaf05ce6/wopasolonaman.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d483d9c63---nunodepobug.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4grb6j8g890ccurhmb31tefc16/benifumafe.pdfIn PDF document text
    • https://superpart.com/files/54650794580.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e0696f59aa8---46551461225.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/wekudowezebixupuwekedot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=cult+mechanicus+painting+guide+pdfPDF 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_off00011437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11437 18632 bytes
SHA-256: 24f314e3a5befd444a87e6d6f779c3a4636e90fb30a4ebd562fb58d9c3818e32
font_01_sfnt_off000144d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144D8 10980 bytes
SHA-256: ae0bb2d968fe60cb61e94cebb3aeb73e0ac8ccfd7bd44d2f5302189461ea8f04
font_02_sfnt_off00015df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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