Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9a856e7fd343d0…

MALICIOUS

PDF

96.4 KB Created: 2021-07-19 00:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b658a5f65ef27e8d7d47424dca08fbf4 SHA-1: 46f99d2f931b1898438a77b11eb1ab0aa8013a1d SHA-256: ae9a856e7fd343d06f26b4594fd336c06c297a5992b49c3be06497a99fe9e1ef
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and disposable hosting. These links likely serve as redirects to phishing sites or malware download pages, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f8238af52---bajubesutimififeg.pdf In PDF document text
    • http://janandpoos.com/clients/872640/File/vebipekuvumegetedixavifiv.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/pilawuzukuroze.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/5329355f22e9359eb968c455e0e23019/36000196856.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/68647959461.pdfIn PDF document text
    • https://jetaime-shop.com/files/dixixatas.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/812d8dcee31beba8ec067b3e42ffef55/rozomujezusekapu.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/91bd0b3dfda5f38640fa4399eede84d1/5916290267.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e168466fc00---bezivinazizomuz.pdfIn PDF document text
    • https://www.neosynapses.com/wp-content/plugins/super-forms/uploads/php/files/rfrv76em8qbov5b06ln9072s6m/87887543359.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/523bd536e478b866ce69ae75a8dd0b3e/jitowujazaganenezazugenib.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/fugazower.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/35457408556.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a67c1bbcd2f---lufugumelulekesekuvoxexi.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/63693944654.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/40534049205.pdfIn PDF document text
    • https://greffedecheveux.center/upload/ckfinder/files/votas.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/gowigunemijupomitiz.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jinojonebaregupexo.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098540d0a223---rosubigewetamosek.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4784578d8---17889427204.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/lukakerosat.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160f496e1be0d9---vutanozulitidufasemewowon.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/besufatadazitejotovedo.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4a988bab8---62971986207.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=the+natural+remedy+clinicPDF 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_off00011770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11770 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F87 10524 bytes
SHA-256: e8df998bbc3c08ef895298d8320fa92ee035b23a776b2306ae806c2fd47b38d7
font_02_sfnt_off0001473f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1473F 17176 bytes
SHA-256: 568e8e70b8d97fcdb836bd0840bc547209ff5c2a5f29563631ead35078e54672

Open this report in the interactive analyzer, or submit your own file for analysis.