Malicious PDF — malware analysis report

Static analysis result for SHA-256 feabd7ebe217bcc1…

MALICIOUS

PDF

90.9 KB Created: 2021-08-08 04:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c429270ee252842d6b99d07178c6f77b SHA-1: 26a9bb7601c15d59c0faae909de596fbdc1624f3 SHA-256: feabd7ebe217bcc1db44ea9fc19c2b28ace5bc7ef444dc737245734dee186172
156 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The presence of these links suggests an attempt to lure users to external sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://c2ctrading.org/cms_upload/files/porudepinunoxiwagabazobi.pdf In PDF document text
    • http://beautybybelief.com/admin/images/file/varemax.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/67053222656.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/17665540555.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9658543ff7---59920434740.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/72093012757.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1056ea918---funadarirowe.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609102a2a622e---48592213635.pdfIn PDF document text
    • http://firegallery.ru/img/upload/58580255244.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/68580055078.pdfIn PDF document text
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/jabogexoxawisabopavujugas.pdfIn PDF document text
    • https://sarna-zapiekanki.pl/ckfinder/userfiles/files/54252228226.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5a5614c17---mibaw.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/cbf71617111a6dc8ca12a052c648db9b/82816723010.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/komaparofa.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a729c7827e---sefosataso.pdfIn PDF document text
    • http://www.electricman.in/demo/frontend/web/uploads/files/1825304266.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/vowonoji.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a59a7e5997c---tanevogazobawofegaxijojad.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/b6dbubmlhgr3htjiidof03utkh/xozidefajufujefakabur.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/tunakefarobu.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/lonigosixofoj.pdfIn PDF document text
    • https://giovannicaputoboutique.com/file/wurujasuvileviwize.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/4514359809.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/karakoxigovuterof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=hack+monedas+infinitas+dream+league+soccer+2019+para+descargarPDF 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_off0000f6b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B6 11608 bytes
SHA-256: cf6b290d4cd411cbdf709b8fe2a394328e01e8aab6e55d54d7d763719909aff0
font_01_sfnt_off0001121f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121F 18492 bytes
SHA-256: f24565f583f3c0fda8c3adf0d5dc121e822696d7ac037fb3784cda3dd5d63403
font_02_sfnt_off000141d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1