Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c2ae8e611f968c…

MALICIOUS

PDF

138.8 KB Created: 2021-06-25 23:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6172d19300e5101e66772957c425a8e9 SHA-1: cc86c879a33f9043b83f395aca705d968fc3e740 SHA-256: 34c2ae8e611f968cb3a9223cbe86341c11bad9c7703d5846a79fe2b552e193fb
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and disposable hosting sites. The primary purpose appears to be redirecting users to potentially harmful content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://flywings.sk/UserFiles/file/8120852844.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fa5be479a---33978200348.pdf
    • http://adirondackseafood.com/ckfinder/userfiles/files/335594128.pdf
    • http://bio86.fr/fichiers/vivexuwawamijemulega.pdf
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a6cb03dcc---buxinijekebi.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c686700d9fa---fefilasasotezenexunano.pdf
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc4de7da4b---ditakizapezotulon.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/0cb125d826b40c22e3ef4d2248a05a07/14458125549.pdf
    • http://alexandraharris.com/clients/36054/File/jezoz.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fab1a37df5---kelomorulupodaduxefitu.pdf
    • https://defaico.com/d/files/pevusam.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a067159c3d0---60065228793.pdf
    • http://soflocops.net/clients/81266/File/58982040681.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d8a0474b3---zolawejolekigazivesibe.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/128496081460980b37981a1.pdf
    • https://novahealthclinic.ca/userfiles/file/dofafekefunukorinaga.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/pgbg0ktg1mkg1380b85o7betf4/16954998691.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/d025213432fac68680359bb0c31ce233/xugekajiludefiwedav.pdf
    • http://mcutech.net/upload/2021/06/file/1623893576909944072.pdf
    • http://easyreturn.store/userfiles/file/tematixakulezitixepedagif.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818ca6b3a7d---31778941494.pdf
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c55774c9b3---sulogesugir.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abb5ccf538---sugojotemolobuxagutok.pdf
    • http://avtokit116.ru/!upload/files/kesupuxoxuvukep.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/5dt2bc1107tsjhpo8bp0te52q4/gevowatipazaritumipu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=middle+school+north
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bf38.bin
6e68a372e2e8364184324651eb92f97c17dbc5cdbca6cacb9692fafc46ea729e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF38 10300 bytes
font_01_sfnt_off0001d652.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D652 16792 bytes
font_02_sfnt_off0001ee64.bin
8827a0482c21261b92c8ee49ae24040e10cb0432eebb6f2e422bf0cf58012369
pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE64 18088 bytes