PDF malware analysis — malicious · 138a6c64a89c340e

MALICIOUS

PDF

170.9 KB Created: 2021-08-05 15:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: 26c8045e183d2ac877068342bd9eb655 SHA-1: f8230cac1150fb4b0338c52135d3c55b68a422ad SHA-256: 138a6c64a89c340e8ad001a3b22c747f5bb6a3304b403e07ffa5be2437d8304d

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to compromised WordPress sites, suggesting an attempt to host malicious content or phishing pages. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or malware distribution vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9628

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c7084543595---89208347407.pdf In PDF document text
- http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607be96f445f0---76284072022.pdfIn PDF document text
- https://adasms.fr/userfiles/file/fetesarafad.pdfIn PDF document text
- http://rjbmachinery.com/d/files/dolopiperevolekiwolusife.pdfIn PDF document text
- http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867649ba1a3---99865405219.pdfIn PDF document text
- http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c22deec94d3---mogopewutopowogatitananu.pdfIn PDF document text
- https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d9547cb2e38740f069b711e6f669c66f/96742278652.pdfIn PDF document text
- http://pritchardreunion.com/clients/81409/File/29308068434.pdfIn PDF document text
- https://noble-program.site/js/ckfinder/userfiles/files/15036894248.pdfIn PDF document text
- https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d789b90afb---2565012478.pdfIn PDF document text
- http://agendatourvietnam.com/hinhanh/file/84122809271.pdfIn PDF document text
- https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/5a4fa58c8c997c8243aa64aa229b4cea/16689016145.pdfIn PDF document text
- http://albertopizzetti.it/userfiles/files/pesovinasiruponugip.pdfIn PDF document text
- https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/a1d9ba786fdefbb63ced4f54598fd966/wezaxegazevaviboredeju.pdfIn PDF document text
- https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/7slniugkbvnfdfpfhlfsto58e3/muwavez.pdfIn PDF document text
- http://touchpanelpro.com/upload/files/zofuxapol.pdfIn PDF document text
- https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/d21b91dda18840486c19ae6bafd467ba/36325256395.pdfIn PDF document text
- http://suamayin.biz/userfiles/file/xopezokipizogivorulawas.pdfIn PDF document text
- http://offerseir.com/basefile/offerseircom/files/gorutene.pdfIn PDF document text
- http://learningkey.org/userfiles/mebasukeditodepu.pdfIn PDF document text
- https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/1782ac9f4a9340217a3902383b13439d/gowavabovavum.pdfIn PDF document text
- http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b05d53e0917---jafomajozizomome.pdfIn PDF document text
- http://holycrossyouthministryasp.org/clients/f/fa/fa15eac34f6f8ef5a8ada011ffef1578/File/5695180438.pdfIn PDF document text
- http://maginsaatmetal.com/resimlerfiles/puvesetagusaduzivevenozu.pdfIn PDF document text
- http://doctour.hu/uploads/ckfinder/userfiles/files/66812662704.pdfIn PDF document text
- https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f1ad18531---bexelekozizi.pdfIn PDF document text
- http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160828320912d0---17051700981.pdfIn PDF document text
- https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a18e8e5c8df---48377148724.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=libro+el+arte+de+la+guerra+nicolas+maquiavelo+pdfPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00022267.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x22267	18992 bytes
SHA-256: `d128433c5dbce71fbfcbded9101ff6fc434c018f11b4c4f52e2f1d26bb0083aa`
`font_01_sfnt_off000252a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x252A5	11372 bytes
SHA-256: `5359b26de7dc23dd217a1591ef211ef35d0bc77c2ad3744fd39c7a0eaeaa79af`
`font_02_sfnt_off00026cb3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x26CB3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off000284c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x284C4	16140 bytes
SHA-256: `00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b`

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