Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d6b6afe7d891e5…

MALICIOUS

PDF

60.9 KB Created: 2021-08-17 23:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f3d83aabcc7bd262f5230e8151aff122 SHA-1: 71de12d7da3f4fd56baf92277359bc1c59f2991d SHA-256: 38d6b6afe7d891e55f15b9252d52b082574e9c9019d4b8bb1418fb8b254c52f1
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan payload. It contains numerous links to compromised WordPress sites, suggesting it's part of a link farm designed to distribute malware. The presence of external URIs and links to potentially compromised CMS upload storage further supports this. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7016

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/16a893289376a8ccb99de15ecd795afd/rinaz.pdf In PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d3192de4af6---waresoxasog.pdfIn PDF document text
    • https://asiajitu.com/contents//files/vupigixokonuruzemivaninom.pdfIn PDF document text
    • http://hajni.pl/userfiles/file/42486217260.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/woronotijuvefezaxigilo.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/75ba208743da1c1d1704207d83d94510/fesoviduzuxogodu.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/nakaxoxubop.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/lewerowomufipibatilabu.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/7354929610.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/dagowi.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c667c3a9bd9---90690970635.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801bddd6fdc---bugegazigogevadelig.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/fc537330e0f2d0f3c23b70bf6d587e2a/tufekuneboxexezo.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/6680253017.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/d5133adc5ab05d2ef8540a7fc04dfd14/61015383469.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/d2461124fd1b3f2719d4955cf654d886/91811456818.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/xelerugemexu.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16093a50f3faab---58571252445.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/3pd3n9o81qr2ok76r2h0go8r1e/60314863925.pdfIn PDF document text
    • http://odumakus.com/uploads/files/nukemapajujajuranobawozor.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16084a6eb5f17b---20941243485.pdfPDF link annotation
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5944e7f1c5---54500008276.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=download+minecraft+bedrock+edition+version+1.14+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC55A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD71 11216 bytes
SHA-256: 1e6669e5265ae976407dae2e85b23b7e695e74e9f8a85b6a9d3cf6ffcf55cabc