Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7cd5f8fe26aaf0f…

MALICIOUS

PDF

86.5 KB Created: 2021-09-04 11:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: bcd878fe292db92377ac0297b0b896a0 SHA-1: ebb3572c45494ff02955b3df38d52b4fe20608c0 SHA-256: f7cd5f8fe26aaf0f0c07058053483d383ede33a4d5a42253503703b8ac12199d
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. It contains numerous URLs pointing to compromised websites, likely serving as a distribution point for malicious content or phishing lures. The presence of link farms on disposable hosting further supports a malicious distribution pattern.

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://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e7bfe3f37---gotezusabokap.pdf In PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/99337904014.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf263de747---besukapezunutez.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160c1079b65d50---28665376574.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/kupot.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210618_A4EB1311189AEAD5.pdfIn PDF document text
    • http://rowadhr.com/app/webroot/upload/files/lodanopovabexitijodi.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7f5f3baa42---42359540832.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16103cd868d4c8---81917460335.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/752528e96910c3f69fea345fbe5cfaf9/92666594652.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1c1b02ee74---57773138914.pdfIn PDF document text
    • https://nadrozmerne-sklo.cz/uploads/birapuvepokosopefiv.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/2119139465.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e72e24b6aa---30995289646.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/vawafone.pdfIn PDF document text
    • https://go2germany.ru/files/file/98650966061.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210715204826.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbadce7db90---wamizaven.pdfIn PDF document text
    • http://dogninja.com/userfiles/files/15129287553.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/genp7kstrqrari0n8vuke00ae8/6768653716.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/34506784287.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/40635102538.pdfIn PDF document text
    • http://behtarinekhodetbash.com/files/files/45738715178.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e466d66a37---46161077230.pdfIn PDF document text
    • https://mnlex.it/file/53741594313.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=convertir+un+pdf+en+word+editablePDF 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_off0000ebd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E7 19072 bytes
SHA-256: 22157b08f7da269ccdfa423c32a04557b93f16c24a1be059eff66b3e4c78e65c
font_02_sfnt_off00013360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13360 10748 bytes
SHA-256: 9baa33efcfc8b7f7a03f4d6fa74e88aec12ec741c1b0fe2f7eeecb9d331c44fb

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