Malicious PDF — malware analysis report

Static analysis result for SHA-256 a679dcf039120728…

MALICIOUS

PDF

63.7 KB Created: 2021-08-26 00:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c514c93ea8f266e32599c635a86eafdd SHA-1: 8e8bf142f8dfd8523512cfb646fb25e4a1b4b508 SHA-256: a679dcf03912072877c3298e7e5342a9bab54c3b8fd5911619075750cb50efb6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a link farm with numerous external URIs, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or trojan distribution. The primary function appears to be directing users to potentially malicious content hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9530

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 http://activesolutionelectric.com/images/file/86801599855.pdf In PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b85fc50cfc0---foxorat.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/d1b5635bc0da1a06cd66e0b3da497005/lipazetunonaxaz.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/83856112802.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d66a747bd71---vuturiruzitomugiwavulez.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160867dae04721---wutopixavasatixulavutokej.pdfIn PDF document text
    • https://esz.jp/img/editor/files/45847999775.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/33e3972d4e041062f83a9fa65612367f/43004513431.pdfIn PDF document text
    • https://pasarangroup2.com/contents/files/63601898449.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/lalamotuxigijowivixivugax.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070a39485df2---gajezofibekajun.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/6q756eo4cgt0a6frl679a0o532/21234297839.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160abf66759c88---nizoxabojirunakotitaw.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16079ce4f2099b---tovapewijufi.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/0b3316b50b7c50a0c0c708259c7946e4/metaw.pdfIn PDF document text
    • https://sproname.com/files/userfiles/files/gobegalemomufemeloparig.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/77cbda3217812f32e8576a5048eee4ab/wepugesinifevinig.pdfIn PDF document text
    • http://gaziogluenerji.com/images_upload/files/75333581340.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/sulexuwo.pdfIn PDF document text
    • https://maisonforville.be/documents/file/mezuputabawag.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/vatanedu.pdfIn PDF document text
    • https://susta.vn/userfiles/file/molejewiwetijikodavizemas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=little+tigers+martial+artsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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