Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e52922b44447054…

MALICIOUS

PDF

92.5 KB Created: 2021-08-03 08:35:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e95c5d57c90b7a12dfd453519d36a8b4 SHA-1: a82840b4254461b31e9bea3e946977a16bf13506 SHA-256: 6e52922b444470546ac082854cd85502c23d0c4766d645fdb69077a50058ebbe
112 Risk Score

Malware Insights

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

The ML classifier strongly indicated maliciousness, supported by numerous heuristics identifying the PDF as a link farm pointing to compromised CMS uploads and disposable hosting. While no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content or exploit kits. The presence of urgency and download button lures further supports a phishing or scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yangpupark.com/uploadfile/files/lowovelipufajo.pdf In PDF document text
    • http://angelescare.com/userfiles/file/pisatekoputabet.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/sivufaw.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/rakoxikunolozusabezok.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/xexutiti.pdfIn PDF document text
    • http://bronia.org/userfiles/file/sisukefumi.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/65d4276e768320eb931e264ca04b26c2/51906738280.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/39347541888.pdfIn PDF document text
    • http://xzass.org/ckfinder/userfiles/files/93326258916.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/70562550341.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/08c2d36c374c75a37780ddbca748f8cd/turidasarugadatuxomi.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/2403a0e670b34492a39604c17800c611/74977155582.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786a9c73064---2020663598.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/litubixidisezat.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/78422347249.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce1ff3e6fd0---setowikeseduxunixakisew.pdfIn PDF document text
    • http://nissanotogovap.vn/uploads/images/files/51198619713.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16084e8470c073---22355715960.pdfIn PDF document text
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/laginat.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/7052d3fb8ee9a77ad69b22695df217b1/midixiwuli.pdfIn PDF document text
    • http://atya.eu/files/file/voseselabusak.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608338a81de81---7602809724.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080c81654886---27096162135.pdfIn PDF document text
    • https://nbretail.com.vn/ckfinder/userfiles/files/52089576740.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+do+i+start+a+egg+farming+businessPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE7 10968 bytes
SHA-256: b1035745fa226d2069418e8127fba501c60bf527679ffcb8c4149ebb1e47127b
font_02_sfnt_off00013529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13529 17888 bytes
SHA-256: bd55e694d56dfaa68223998e752ada4af481f16f088ce20b5f55ffa381ac8ac7

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