Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c2e8007acd07b8…

MALICIOUS

PDF

90.2 KB Created: 2021-07-02 02:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f3458cc15d22ce159c1cfcd5f770262 SHA-1: 0a550e1a6183b6a4b2c621c5f1b95f5a1fccecc7 SHA-256: 62c2e8007acd07b8a3abc14cadfb0b1c2a32ec679ed72efe2974882803fa3abf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/p91dd90u8ag1fg4oh22i74qnko/7241815346.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/1a9019610ab4128c5caa17f9dc332549/sobixaladidewu.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/75490025187.pdf
    • https://dalnoboy.com/data/filestorage/upload/files/36147398221.pdf
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/7c4a94f0f395f2e3692bdf09c9270ca3/85381628382.pdf
    • http://hasici-pristroje-eshop.cz/files/file/74344851882.pdf
    • http://badaranquehablar.com/userfiles/files/masokegufukururakarukopek.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6916db4db0---gezapibipizazalefiluliv.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a610c4caa---89704163059.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b819e5198ce---kekorediji.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/ni3ki2r0au652ri75c2pd509bt/15687878375.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/9140d963c961be5636965cdfc8eddf1c/19658105217.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb0d41a0f5---31004923194.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a79a3f2fedd---vunodufufajabedelanamofo.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4cfd708b7---delofakowo.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/24c55b89e4d4cd9c545dcd2ff0ffd367/72551071690.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbc5810a79---76200059020.pdf
    • http://sungsam.net/userData/board/file/vaweborugumozasikewani.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b5f336d5d---sarogixopa.pdf
    • http://atomleasing.ru/media/File/kuguzepotimezasuzixa.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/c56m0pk543cfuvdprd6h97btl3/19866611801.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d41476772---95962897460.pdf
    • http://bajcsidavidfoto.com/_user/file/10535037588.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c0474205aab---sedararerudalevelotirisig.pdf
    • http://czpohledavky.cz/userfiles/files/19450139507.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=a+baboons+but
    • 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_off0000ff56.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF56 16792 bytes
font_01_sfnt_off0001176c.bin
84810f770918c9e83e7921d3dc0df0d881993be9faad94fb40b59cde1941fbb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1176C 9952 bytes
font_02_sfnt_off00012da8.bin
ee5eeae9bbf2570bbd19446ae1810b5618843c339437ec071ce44007c30eb58a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA8 18008 bytes

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