Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c7cd964ded27f3…

MALICIOUS

PDF

123.4 KB Created: 2021-09-16 23:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 452025d98b37c3963096da4c38e51d53 SHA-1: 06db64fe4778e9c9d95509856bc7079e9c2b2b56 SHA-256: b0c7cd964ded27f350c29cc608fdf26a3a6cfea41181ef21bfd15339326793e6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were directly extracted, the PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://www.jasolasia.com/image/upload/File/46325507173.pdf In PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4194c6d71---rapifefadofusele.pdfIn PDF document text
    • http://tms-technology.com/ckfinder/userfiles/files/84552504750.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/pupudap.pdfIn PDF document text
    • http://nissanotogovap.net/uploads/images/files/tezuvitaw.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/dopunelumuto.pdfIn PDF document text
    • http://pescepiana.eu/userfiles/files/renanovogexiw.pdfIn PDF document text
    • http://hmondo.com/userData/board/file/kawexubu.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/91028215003.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f26c0a6e0b---54860332664.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/kafagerinewelusaroduzij.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/71574937100.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/kuvepenisowezu.pdfIn PDF document text
    • http://17njl.com/userfiles/files/16604567382.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/goxiruzuk.pdfIn PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/tovupidaf.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/12254981378.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/semazuruzaximevobidofal.pdfIn PDF document text
    • https://masihpt2.com/contents/files/fuzegozafutimonebikumak.pdfIn PDF document text
    • https://orderpoet.com/ckfinder/userfiles/files/xatuvogeluvanilej.pdfIn PDF document text
    • http://nationalherbo.com/userfiles/file/fasesabodinivukaralosug.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/54992419983.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/vukusujumewilotikosiwegem.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/52611009899.pdfIn PDF document text
    • http://iucecb.com/files/file/jadofofena.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=bs+raman+accountancy+textbook+pdfPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cadb1d1aa0---jutoxaxozozibuxemonutir.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_off00017019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17019 11244 bytes
SHA-256: 455cbd1610eb0c88288a35a2e516c08a2262f53b1abc2944039e376b161893f3
font_01_sfnt_off00018a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A27B 22900 bytes
SHA-256: 7b911dc75eb275a34212b6365983a1218722e649ebe99218204ad22ed75eb1b2

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