Malicious PDF — malware analysis report

Static analysis result for SHA-256 8319163177299e27…

MALICIOUS

PDF

69.3 KB Created: 2021-07-16 21:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0b491d0453359f2d9d6d483f57e091a7 SHA-1: 5dd17c39207828e689977eff1aa7a60cf4d41407 SHA-256: 8319163177299e276d13746bdb9526333fe9bd29940bbbceacc92ce0fd90fce6
124 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites. The ClamAV detection and heuristic firings indicate this is a phishing or trojan distribution attempt. The primary function appears to be redirecting users to malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4905

Heuristics 5

  • 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
  • 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://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/5c473e7a6e96dff5fd8a44422607ceb2/xolidanorir.pdf In PDF document text
    • http://fructusartis.com/i/File/pewoxose.pdfIn PDF document text
    • http://thetuckerfamilyreunion.com/clients/67950/File/37897471695.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/7620488638.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51c7219f77---77284895414.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/3fv2om8i0g46d9m842hji4qn62/5439908473.pdfIn PDF document text
    • https://wittnebel.dk/file/35781906662.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/47126652884.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/62591514897.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cad9a0c6dde---32267488438.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/faturawodot.pdfIn PDF document text
    • http://goodslib.com/userfiles/files/zagewiwodosazomubusoxegim.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/motavipazafaruvogad.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a15cbdb6fc7---79642571572.pdfIn PDF document text
    • http://grapevinewinerytrail.com/clients/876125/File/18229725198.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/hisa3ehg85fn4h8339du2n0l24/pixidavaw.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/kisukorozo.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99da17bf38---44442813131.pdfIn PDF document text
    • http://foodchemsino.com/d/files/76201559666.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e6b3a8f1829---39323269488.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/dac61fb5687b653627ba599f64b3059b/88486390064.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/45935751636.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b608c868750---48087311868.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=indian+knoll+elementaryPDF link annotation
    • 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_off0000c077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC077 10396 bytes
SHA-256: 098f6d161d367f345533f0100cb59f6d209ebf0b4985bcd413aeaac3053d3a37
font_01_sfnt_off0000d7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000effe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFE 16532 bytes
SHA-256: 3e6cefc0a884be789ded0bd66410c653ae2fdedc3f320c491ab062f27953e195

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