Malicious PDF — malware analysis report

Static analysis result for SHA-256 5179a96248e255c0…

MALICIOUS

PDF

74.0 KB Created: 2021-09-07 15:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f0177364b87de8af92e8252a0ff014e1 SHA-1: 0ae25cad1eb7ba55751605c599fb4863386d1ba4 SHA-256: 5179a96248e255c0dd2d3e1deb90cacd7946655db13570112f440d00eea388fb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the execution of malicious code or redirects the user to malicious sites, consistent with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=manual+testing+jobs+for+freshers+in+navi+mumbai PDF link annotation
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084055d4387d---51300925352.pdfIn PDF document text
    • https://retake.dk/ckfinder/userfiles/files/ginijosivumuziluladozo.pdfIn PDF document text
    • https://bczenekar.hu/files/file/51872026419.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af98c0001a2---xibiduworababanekoso.pdfIn PDF document text
    • http://worldsocialistpartyindia.org/ckfinder/userfiles/files/supiwinavazib.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cac56a75335---faniruwegaj.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/37985142410.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/nometowejajatanur.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/zebolizukabaxulenoxenedo.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160969d4718562---85639553053.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/eb40ae655a96cd6b19bc3d81c58853e2/gitimixedivigojizifezurog.pdfIn PDF document text
    • https://csp-pub.com/stockages/files/zopodeweki.pdfIn PDF document text
    • https://majubesar.info/contents//files/juzinovegabelewedulebamaz.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fce6c8aeee9---nilujusuzisepa.pdfIn PDF document text
    • https://shinko-tw.com/UserFiles/file/84640159791.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/xomikebegakebazorotigodov.pdfIn PDF document text
    • https://lesura.net/userfiles/file/lisijivagamubapibak.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/65368190778.pdfIn PDF document text
    • http://kappp.ru/js/ckfinder/userfiles/files/36627586096.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/37298300376.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/a9c5964fead6d0e80e3d630358bd3c00/guferexorodosimanotij.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160848e916185c---lubogebozopamawikinusi.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/tuvefivuxezimokot.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/minapiwawisutawawop.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/0c991dfbaff9572e2b91f6185cd10c16/xokodagewutof.pdfIn PDF document text
    • 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_off0000bcec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCEC 17140 bytes
SHA-256: 381fa3bef522a09af4d0be79b4dc23061d25979b8cc98874a0ededa7a67df70f
font_01_sfnt_off0000e8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C5 11092 bytes
SHA-256: 4494f557100175f3c1d96a6a55a51614e4ea6b56276eb6ff769d443eb271c062

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