Malicious PDF — malware analysis report

Static analysis result for SHA-256 adbcb064766c0292…

MALICIOUS

PDF

82.9 KB Created: 2021-09-04 20:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d1317b2eea8bc28bf34104eac5c1d83a SHA-1: 7c41e555c3856f79d5359f17a48c9fbe9b6fc0df SHA-256: adbcb064766c0292750ca92cd50d11d071de5ba5b4d836422ebadc263b2554a1
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous links pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The PDF structure itself appears to be a lure, likely intended to be delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://isagenixmakessense.com/ckfinder/userfiles/files/tenijobunagawubifegovesur.pdf In PDF document text
    • http://broadgatecapital.com/userfiles/file/75668789101.pdfIn PDF document text
    • http://dentherapia.hu/files/file/tedaj.pdfIn PDF document text
    • http://totoumi.jp/upload/file/juwaxetifafotejisawan.pdfIn PDF document text
    • http://nineslash.com/user_file/file/gepiwobepokuga.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/visovirerofa.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/cj01b555dn50d1jc3896t5vu3n/1721588513.pdfIn PDF document text
    • http://tplustech.com/images/ckeditor/files/fapasir.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/d33df9301a107993fe1b378281055e69/milowuxixunexu.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/pegupubupokagijujeburo.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce3444108a---nakutimimibevoxuvekuram.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d218ee667---54575094723.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebe3b1cafc---tisapisuremo.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810fe12f0f7---16274821035.pdfIn PDF document text
    • http://cfacgroupe.com/uploads/FCK_files/file/27243393362.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog/file/pujowepazosi.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/83431670355.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/m9ht6k02hufo3r193r9ln3399n/fejaxabibaduforamukigeno.pdfIn PDF document text
    • http://bereanbaptistashton.com/clients/1/1c/1ca8668e480cca1e897b6add33210fc6/File/rujadulevawejonegirerik.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/dovupopulapazur.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210528_AFFAC03AEB0B2611.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/46054806258.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/89rg2o7td7loqjs2tcj3angkb2/48133209785.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/76966981560.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=manual+processador+philips+walita+ri7632PDF 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_off0000dd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6B 11300 bytes
SHA-256: 7eb8329bb8c1dd01c53a87a4a83e21d641565091cffa1fd92da777928ecc2d50
font_01_sfnt_off0000f811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF811 17620 bytes
SHA-256: 007b4769e3c4e3c65855f7259991ddf9e1e34516fb869f00f98f370ad19e9ff7
font_02_sfnt_off000125d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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