PDF malware analysis — malicious · 682b2f9cf871d92f

MALICIOUS

PDF

89.3 KB Created: 2021-06-26 10:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 1ac3f330c59ac29e1b2c2270d0f5ef23 SHA-1: 475378b8014acb47b67614a0c36c938ea64f371c SHA-256: 682b2f9cf871d92f548519927e6c86fa924e268a34e92ced413e44ecbc84ecea

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and numerous external links are consistent with a malicious PDF designed to lure users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d03c43c763a---mufinu.pdf In PDF document text
- http://nitexprofi.cz/userfiles/file/tufisodurepulevevigolen.pdfIn PDF document text
- https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/g42lq5svm8lfauc72u14l0t3hu/mulosiwegamemidagopo.pdfIn PDF document text
- http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/c13b315fdc0d41d56265cbe36fbfc385/59648228951.pdfIn PDF document text
- http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afd5c98537c---16315120703.pdfIn PDF document text
- https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/07af240a5edfafb2104d94bdbc89b4d2/tokiludefa.pdfIn PDF document text
- https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/1e355e9be33d8e49d687ef7052b83325/lizuxuzojosajebozak.pdfIn PDF document text
- https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/0me4baearjkopn1v3i384ugk9h/17259591678.pdfIn PDF document text
- https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/bnv7cj0mhiclht7if2v90st6a8/vejakesapizowaroxu.pdfIn PDF document text
- https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee1786ecee---46812320681.pdfIn PDF document text
- http://bielwod.com/userfiles/file/61699398487.pdfIn PDF document text
- http://fritz-fahrlaender.ch/download/diwexaxutiwikilixanemub.pdfIn PDF document text
- https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609884c45eeb2---lexoxelezugezulono.pdfIn PDF document text
- http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6fa7165f1---74925696519.pdfIn PDF document text
- http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b005ef77553---47341320251.pdfIn PDF document text
- http://mbcasc.net/imgs/file/99054135587.pdfIn PDF document text
- https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce0d8937368---gaganavoratugebuzekopime.pdfIn PDF document text
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b083a9a0688---61220906974.pdfIn PDF document text
- http://aceonlinementors.com/userfiles/file/31641198676.pdfIn PDF document text
- http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/c6f4d13add948b5039be445ebf883ea9/sapojak.pdfIn PDF document text
- https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5f79e5008---4765720428.pdfIn PDF document text
- http://alliusie.com/userfiles/file/xusebu.pdfIn PDF document text
- http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7fad8bab8---pefogizewikepaxesuxax.pdfIn PDF document text
- https://internationalmedia.com/userfiles/file/wozaresarabajox.pdfIn PDF document text
- http://dhs1970.com/clients/9/98/98bceae81adeaace0f0761aa7b0d12fa/File/88371078281.pdfIn PDF document text
- https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/471cd6d20204ed76972529459eeb178e/37500943235.pdfIn PDF document text
- http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16073584eda306---jasupulira.pdfIn PDF document text
- http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55d1b86495---68731727502.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=atonement+chapter+3+summaryPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fb2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB2F	16256 bytes
SHA-256: `1801ba88ba49527919352244d175323da9c268da7cd765bd3b57f2b9ea07e094`
`font_01_sfnt_off0001251d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1251D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013d34.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13D34	10868 bytes
SHA-256: `cbe81c19574cbe0c67ae1af3a35430a16a26d849259c402de2ef0de418e6d003`

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