Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b6a93c5de592b68…

MALICIOUS

PDF

94.3 KB Created: 2021-07-07 22:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2452f86c479def83af6c7b8a31d8d921 SHA-1: 442416737a10a4988d26d7cb421a1c4eb6cfaf5a SHA-256: 9b6a93c5de592b681a8aeb55a5872b7ae71fab1966114399468fe48560c0616f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV. Static analysis revealed numerous URLs, many pointing to compromised CMS upload directories or acting as link farms on disposable hosting. The presence of external URI links suggests the document is intended to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3228

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://infrive.ru/uplcv?utm_term=alita+battle+angel+tamil+dubbed+hd+720p+movie+download PDF link annotation
    • http://timebymtm.com/upload/files/kumisawebix.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/e1c4dc87eb686a9890c43f430f470043/1504509550.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/05fe8eae199cda60f6326b53a38c4ac4/94300037499.pdfIn PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/mapatikofubonozop.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/78e3fbd0b9238c6cfc4dda239bd6fc28/lakibu.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/jofababifo.pdfIn PDF document text
    • http://terralindahigh1981.com/clients/866868/File/53943596604.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160704447f1b42---42653507786.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/k2u6jahd1v24ndf2mvo616nsfq/8017434934.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/e950dfedc76793af536e6680ff8febd4/pibaso.pdfIn PDF document text
    • https://angkagenap.com/contents//files/tipukajuxanodomukugival.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/utbskvputvnbjmr585hmbkprio/18880943243.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/36911256252.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/23080957981.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/waxuvujuzodisen.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c857155b4e1---20498601695.pdfIn PDF document text
    • http://landpas.pl/upload/file/48351189247.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1d2bb257b---gubajevu.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/p5p87sc9su6mrhtbd7pi2iqaji/57981265489.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/0oot67fmiq9f2d8mkia2tr5dp6/33636001107.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/darisepaduzuwig.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/6880535348.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/39585041816.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fab47854e8---44995483463.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF321 19660 bytes
SHA-256: 01d9fd0c2679f7538a1f19aaa15bf0830e9028c09510b029b320ebad1d8162af
font_01_sfnt_off0001272e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272E 4112 bytes
SHA-256: dae021002016305cc046e8b6ae2ea88af642ac25a6af5d117f88e659cff0607f
font_02_sfnt_off000136d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D3 11236 bytes
SHA-256: 5860005dc8224802a8b94a911676ccfd55b448c17ed510dc40d6e10b5f29948d
font_03_sfnt_off000150aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1