Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b6ce7f9a681830…

MALICIOUS

PDF

77.7 KB Created: 2021-07-02 03:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: dc1a12aad2f46d63ae8702728fdbab3a SHA-1: d95ea8d564c5726346394e3826ceebf7cb890109 SHA-256: 68b6ce7f9a68183064edab98045cfe81e3106ce7ea83eebbe6777de3e776a58c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The document functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload storage, suggesting an attempt to redirect users to malicious content. The presence of multiple links on disposable hosting further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://mastrodibaglio.it/userfiles/files/lizadajafuferanikoponopo.pdf In PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afc46c210d8---88260418633.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/ed569e5287cc9e7997c06c7064b47c13/tazepev.pdfIn PDF document text
    • https://tosto.cl/ckfinder/userfiles/files/86225492162.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/4a09c3d1f027601e1d83fbda137e18a5/61918262816.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/ed72513d0a86613e0c1d9e9e549ace24/95688636913.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/ttnfv7a2qa5ovlsb57v9k7kq23/lakezetigirogafupukog.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/24498143298.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca299fd3b---jewopizanetekafiwibiwidej.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbedaa2079---bosezutojirugojekiwi.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/73389889193.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/94346767929.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/4c85c0cae5b21db0673663433947f2f9/45299476165.pdfIn PDF document text
    • http://fullx.net/files/bedafusanexipage.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ug29rc9ubgg76js0aguj7gne1s/90852399951.pdfIn PDF document text
    • http://stevis.cz/files/file/tabesuzililodozepu.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/10557663831.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/29489705043.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/9p55k77jsmg60j29srsbeu43e7/98102838018.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/xewujifemegoderiz.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160d3a701afd17---zajarami.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/b540d8ffaa426746f38a15bd260a306b/bomopovebarevuzatilikig.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160984b17f1f91---gejajirafabunepomuneni.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/40086629531.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/74591291856.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=limitless+episode+1+free+onlinePDF 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_off0000cd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5A 10508 bytes
SHA-256: a80a2af20b5c443d396faec505c9630cfffd9aa2fecf5ed36043f9719cb21681
font_01_sfnt_off0000e539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE539 16924 bytes
SHA-256: 6931c4aea3df1828acee21ea68d112f7bd16bb79b946e3e1a09a0d8727e71331
font_02_sfnt_off0001118e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1