Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2104693f850d37…

MALICIOUS

PDF

100.2 KB Created: 2021-08-18 20:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 058960703ac22d3868fe0969168a724b SHA-1: 3c593413e6256cbdb5649567711847183f34b169 SHA-256: 0e2104693f850d371c2820cee5ad0d492bc88afcb14874beb1d7409d717fc753
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories or are hosted on disposable domains, indicating a link farm designed for SEO manipulation and potential phishing. ClamAV and ML classifiers strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the structure and URL analysis suggest a malicious document intended to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sitodugatulujajorafaj.pdf In PDF document text
    • http://emusicmarket.com/upfile/board/files/xuxesobizefomifefifuvujox.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/mukilizine.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/32210450624.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/3b094311729f74f10329580d412685c4/wijoxe.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070879d9dd93---matujakefelab.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/32761608728.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/vuxovemitidizo.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608020def2a27---kopulojutajizofunup.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d997a2a1a---66842023870.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/98378578754.pdfIn PDF document text
    • https://phucatgarment.com.vn/ckfinder/userfiles/files/jonufonipulipubuwuzunis.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/41a3786b6b28ca6af95d55364a82287c/gumanepajexigokezerarire.pdfIn PDF document text
    • http://gyogytornasziget.hu/uploads/files/nixogidamepunozugaf.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3210d2638---zamibeb.pdfIn PDF document text
    • http://deficanderel.com/clients/6/67/674a09facce11b7629d390eef9534ff9/File/rozewer.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/48d0cd6c83696081ecac1a609447ea32/91567854139.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/cd83b219cb226f8ab06993c2abc2efae/sasinanakufamarupizus.pdfIn PDF document text
    • http://2m-m.eu/userfiles/files/90113320179.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7ecd87e5cd115e148e7ace59186a1a9d/jugux.pdfIn PDF document text
    • http://briztravel.com/upload/files/sivemutonaza.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/7e83aaa51499215f872df968220f2ed7/26043799827.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/dadotodofazunepejuvulam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=the+cask+of+amontillado+questions+1-14+answersPDF 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_off0001222d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222D 11292 bytes
SHA-256: 5f709215fdfb350477ace517c39c38cfb5b05417fad66d077f39f0a03a34572a
font_01_sfnt_off00013c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001549b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1549B 17828 bytes
SHA-256: e37fd080eefb76e0759c8a88ed51e2f2e5aab26449a4640fdaffa560ff68f940

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