Malicious PDF — malware analysis report

Static analysis result for SHA-256 597260472aa09062…

MALICIOUS

PDF

82.5 KB Created: 2021-09-20 09:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 46245c29ce64de2cb1888b1442be8561 SHA-1: b23dea6a9e7f6b7a914bb016dc387028d46c9e62 SHA-256: 597260472aa090622d7fc02a12a4dea4d980390aebbecfdd73467d1ce9741d2a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The presence of numerous unknown URLs suggests an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://gurgaontaxi.com/pa/trainstation/uploads/image/file/47638884611.pdf In PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/zofoxowudobukedenarisa.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/luvolimururivevolifeker.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021941919348086.pdfIn PDF document text
    • http://www.mousumibanerjee.com/fckimages/file/98724883091.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/11648242257.pdfIn PDF document text
    • http://www.jysunshine-hotel.com/up_files/file/79344277128.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161383af1eee73---zudosinolabasupi.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614720946b334---novas.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/puwelirudexututesatevoz.pdfIn PDF document text
    • http://mvsexpo.ru/admin/ckfinder/userfiles/files/68561155774.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/66070638693.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/98312876838.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/22806431634.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/78569111913.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/26257083204.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/xujuxiguwataj.pdfIn PDF document text
    • http://hmed.vn/upload/files/6829330275.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210905133110.pdfIn PDF document text
    • http://lapmaymn.samdigroup.vn/app/webroot/upload/files/wegiwewevivukifaboxetoj.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/5ee0d0b839c32f1ac90ced89db8f6bf6/tagovubopapoxuzetuderatow.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/ginegefejewawebu.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/32241c8e35a934f6bbd1456d43ac2f95/wulaxigoxidoluz.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/sepadexesudavakazupota.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=30+days+fitness+challenge+premium+apkPDF 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_off0000d6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED9 11452 bytes
SHA-256: bbb0f4166dbd24eddc70e71ea5e7e1be7a3b971aabc3cb5f7086e72a15cc5e08
font_02_sfnt_off0001097f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097F 19196 bytes
SHA-256: 3dc081cbae81751a2ae0797be8c836f15ebb210c95299dec28ebd4c7d1911c48