Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb227cb42f7c5231…

MALICIOUS

PDF

75.3 KB Created: 2021-08-12 01:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c51bc472903b4eae2601007924c48c31 SHA-1: 13b508fbfac8b9f42400990dab2a3b458eda4069 SHA-256: bb227cb42f7c5231084dfc04d1721609f9d0efc69dfc666b7e5dd42963facc00
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to exploit users through social engineering or by delivering further malicious payloads.

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 https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/e29cfd834231b591974c7352037e232c/talugir.pdf In PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/abb0b511acedd0a5086f514890d83005/44921919584.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/4a6d097d2cf8ba6787d774589c800cfd/togoworenoviserokenilif.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f29bc6c119---23593089367.pdfIn PDF document text
    • http://norview63.com/clients/5/59/59ba6e1aa7224642a1eeb14435756cbf/File/mubosogig.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/mopexugasabebexakivovapit.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b354eafee0---kajoz.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/87326560204.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109a8a475ae4---debinurapujom.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/wizarixo.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/tusisugizejaboxexaki.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/47781637737.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/xipodi.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/d06b990ti8b79nh4ggtdmrb9l5/nafab.pdfIn PDF document text
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/d95c5533dd2b4408e886066541c34eb6/kubebizuwusoroputus.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/45a678901456df0eb17ec255fffd9961/48877088557.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/pugibojetixikebumola.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/48002790281.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/sozokuguxox.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/xaluvomonapu.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/lufepujepikiroze.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4dd076e38---kinerona.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/kinidobanuposemaxa.pdfIn PDF document text
    • http://st03.it/userfiles/files/24225990719.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6675ca4ea---fanokinipuresarimosinud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=sistemas+electricos+de+potencia+pdf+libroPDF 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_off0000c250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC250 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA67 10996 bytes
SHA-256: acda1f21de414c89c33c8fa87cd325244afabd2a1026a249cb9271d9d1c4b54e
font_02_sfnt_off0000f3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A8 16540 bytes
SHA-256: df858dc40c7cf4b56625ef311d0c54790c734334431d8b597d782d19db1baf24