PDF malware analysis — malicious · fba875e12cfb3a9a

MALICIOUS

PDF

83.0 KB Created: 2021-09-16 08:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: cf64f56ab6cafcf07f053b86a09277c7 SHA-1: 08ab1fa12efb588583bafc70a7cafeb9f632ce17 SHA-256: fba875e12cfb3a9aee283a2450cedc749d23ab3ba5a415f588988bc8f78ff4e0

192 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded JavaScript and multiple URLs pointing to compromised WordPress uploads and disposable hosting, indicative of a phishing or malware distribution scheme. The presence of a 'download button' lure and callback phishing context further supports this. The ClamAV detection and ML classifier strongly suggest malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9911

Heuristics 9

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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 https://philabc.ru/uplcv?utm_term=pok%C3%A9mon+omega+ruby+and+alpha+sapphire+gba+download PDF link annotation
- http://finalstage.biz/js/upload/files/vapuxufobuwewunifemav.pdfIn PDF document text
- http://haiqi-machine.com/d/files/tenidibure.pdfIn PDF document text
- https://infoenergie-loire.org/userfiles/file/95529108950.pdfIn PDF document text
- http://icbiz.ru/userfiles/file/vokifokaxukuxerinagaboz.pdfIn PDF document text
- http://savitaco.com/uploads/images/files/megisepimajo.pdfIn PDF document text
- https://s-h.cc/uploads/files/202109080909235105.pdfIn PDF document text
- http://bbdecontra.com/userfiles/files/49075809083.pdfIn PDF document text
- http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161394d0e8e14f---39332050987.pdfIn PDF document text
- http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/gevoreju.pdfIn PDF document text
- https://bodzlomu.com/userfiles/file/86238895778.pdfIn PDF document text
- http://27derajat.com/assets/ckfinder/core/connector/php/uploads/files/4000408484.pdfIn PDF document text
- http://ya-ke.cn/admin/upload/fegizapatesuxaf.pdfIn PDF document text
- http://warmistore.com/userfiles/file/kuvoxilewefaxilopojot.pdfIn PDF document text
- https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/a065595b3d839d2e14931bf4b06e34ed/10563421576.pdfIn PDF document text
- https://1tlstar.com/storage/uploads/files/viziladukid.pdfIn PDF document text
- https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/e37653dcc84759862dc0acefd0f6e66b/fisalakisutafolivemomut.pdfIn PDF document text
- https://santa.sg/images/users/00000000/files/20130296323.pdfIn PDF document text
- http://kxqcgs.net/filespath/files/20210905181755.pdfIn PDF document text
- http://qiuyutv.com/userfiles/files/20210915075240.pdfIn PDF document text
- https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/d5jtmnvsrknid1fbq352bjf7pg/54201852597.pdfIn PDF document text
- http://mmbassisiprovince.in/files/js/ckfinder/userfiles/files/naxusinefowaju.pdfIn PDF document text
- http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/sorapofazabapesesakepabol.pdfIn PDF document text
- https://inprovitecuador.com/ckfinder/userfiles/files/87119896722.pdfIn PDF document text
- http://nhatminhtrading.vn/app/webroot/uploads/files/79207739739.pdfIn PDF document text
- https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/d25a698a0d69debbfa7a523dc6a3fa07/86762325002.pdfIn PDF document text
- https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613761336ee70---971907462.pdfIn PDF document text
- http://proxkimya.com/resimler/files/91956500184.pdfIn PDF document text
- 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_off0000da64.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA64	11428 bytes
SHA-256: `b6dbfd8915d09dcc488171be2230c181f7bf9c5fd67d32e9c038043a368f1ef5`
`font_01_sfnt_off0000f47b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF47B	17824 bytes
SHA-256: `256a3d7ab30b14b2eb2e488fd308d08051c777188a108a2e73bf5da7e3e76c3c`
`font_02_sfnt_off000122f3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x122F3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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