Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc4e40166ff3f7d…

MALICIOUS

PDF

200.1 KB Created: 2021-07-31 20:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0001ac8bbace11be02faa9e9cb568f6a SHA-1: 3a1ff0f5d81dc9bfc2357b1b90ca6e843bf392d6 SHA-256: abc4e40166ff3f7d9fee49bf64ad903dda4112671881a5d15866fa62a6c500c6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or delivering malicious content. The presence of numerous external URLs, many pointing to compromised WordPress sites, suggests a phishing or malware distribution campaign. The ClamAV detection and ML classifier further confirm its malicious nature, likely acting as a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9610

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.
  • 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://ketchas.ru/uplcv?utm_term=numerical+methods+for+engineers+7th+edition+solution+manual+pdf+free+download PDF link annotation
    • http://automsystem.com/UploadFile/file/20210727223025302.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/3ad5c925771f26e7f292af338254d346/17047695798.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/75557588235.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abaad34958d---5985370398.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/10b256f161e71e8be7c2583347b0842f/52355261306.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/16532586580.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1b3963757---vixuredimixujox.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/binojotinasovokijaj.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/390d5fe2b6e81765a07fcbde13ab3bd3/lekajekuwudufumofofukivo.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a012c15f6ca---zaxujinemejijojidawimel.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/45a5c947eda2a2bedf8a90d62faabee2/mifokovazikol.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/vazod.pdfIn PDF document text
    • https://pomacanthe-art.fr/imagebeforeafter/files/66267531218.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/39580263762.pdfIn PDF document text
    • http://yocarbroker.com/upload/ckfinder/files/33072409473.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e8054c4a4---seluxumo.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/sugoxotefiborelajipulenuv.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/vokafotogirikito.pdfIn PDF document text
    • http://hermangroupcorp.com/clients/3/38/389628ddbd62db2fa1e4299ecdfc1861/File/gasorixenej.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/44865754317.pdfIn PDF document text
    • http://www.idukkidiocese.org/files/js/ckfinder/userfiles/files/rofisovoz.pdfIn PDF document text
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/67357906792.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/175294903560ee1df45092b.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/mibakobapebivimedamujaget.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16072d1634c436---53021791939.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/xukijedir.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_off0002ac50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AC50 11280 bytes
SHA-256: dbfeed477f828b19eb92cd4a867132dc9adc31a1c5108762b0e27704ea5699ed
font_01_sfnt_off0002c680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C680 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002de92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE92 17924 bytes
SHA-256: 5c2695b8de97f1a8289942249df654d56fcea0948e40d38ff995bf1658399725

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