Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b0935eb87ffd78…

MALICIOUS

PDF

63.7 KB Created: 2021-09-19 14:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 073c5fdb122fe607fbcadef0f9a74be4 SHA-1: 1f0178c1e6293df9900420f08122615a14cf45fa SHA-256: 30b0935eb87ffd787c52fca31ab898bb0432fd50043e3b2f6f6518c7bf248f21
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of external URIs and link farms strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6960

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://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/a633f1facab8393a3081cc5dabe2c904/18229830749.pdf In PDF document text
    • http://qlionshousing.ca/userfiles/file/koxodifewetaf.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/kolizamujadoxa.pdfIn PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/bugemasolojoleji.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/tinawokovojid.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/70807722350.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/5396940875.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/movusixotodejoliw.pdfIn PDF document text
    • http://beijingteye.com/upload/files/sizabevotubuliresivu.pdfIn PDF document text
    • https://designsdubaiukfashion.com/userfiles/file/8575611036.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f44ed5e383---porazatefawojebesoxivik.pdfIn PDF document text
    • http://www.workbythai.com/admin/assets/images/25330391092.pdfIn PDF document text
    • https://akonis.ch/userfiles/files/lusesujujonuzarop.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137380f66162---63031817234.pdfIn PDF document text
    • http://www.nena-artspace.com/ckfinder/userfiles/files/83790786218.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/caf76571d99ec2060330f1abd31dcc0a/76186443867.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/19225689696.pdfIn PDF document text
    • http://contua.org/userfiles/file/89935180525.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/97035094803.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/78928540541.pdfIn PDF document text
    • http://trunghungplastic.com/luutru/files/10948712680.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/42200928571.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/94959613853.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=c%C3%A0i+%C4%91%E1%BA%B7t+google+chrome+cho+androidPDF 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_off0000dab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB9 11284 bytes
SHA-256: 777bcd775dc1aa2b9796d799d8b3a5726541e4a62952f1b213edd121703a4331

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