PDF malware analysis — malicious · ceccf9697d3a70b6

MALICIOUS

PDF

82.5 KB Created: 2021-08-21 23:30:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 2201c9358c7cc22f30994e71e414fd20 SHA-1: 2761de237f6ac8ebfc0d9fdbc64336e8db6cd9e7 SHA-256: ceccf9697d3a70b6989ca9cc3add00ec7830e136ed703c1ef7c69a6954ffa613

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to potentially compromised WordPress upload directories, suggesting a phishing or malware distribution lure. The embedded URLs, while numerous, do not provide a clear second-stage payload, but their nature as link farms implies an attempt to direct users to external malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9911

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 https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084e257f3076---komawutekefogonupanapini.pdf In PDF document text
- http://spreewaldatelier.de/img/editor/file/12007867151.pdfIn PDF document text
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/8440f03fa1624e44ab56b383e3fc34b4/zitaxojadixoramoba.pdfIn PDF document text
- http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098d21f9d244---78622292332.pdfIn PDF document text
- http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/52c093b53ad03450474849c68c28af1a/60880715567.pdfIn PDF document text
- https://demetraproject.eu/ckfinder/userfiles/files/puxuwe.pdfIn PDF document text
- http://lideparts.com/userfiles/file/1621682072.pdfIn PDF document text
- https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fff93b71331---4410890907.pdfIn PDF document text
- http://gitimohammadilakhimpur.org/ckfinder/userfiles/files/tuporemajaxesakifisid.pdfIn PDF document text
- http://globeksa.com/ckfinder/userfiles/files/bemijuladubuzulipinoxiri.pdfIn PDF document text
- https://chief-moving.com/editor_upload/file/7676855417.pdfIn PDF document text
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/d935a8583df349da0ad41620fa4ab520/30463686938.pdfIn PDF document text
- http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c74818faf0---84974755316.pdfIn PDF document text
- http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cd357b52b---namipolaropunexa.pdfIn PDF document text
- https://billionbosses.com/ckfinder/userfiles/files/fumojamitave.pdfIn PDF document text
- http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160870ae661fc6---pokokuvex.pdfIn PDF document text
- http://batterseataxi.com/survey/userfiles/files/13443554383.pdfIn PDF document text
- https://arrayamed.com/userfiles/file/25082691475.pdfIn PDF document text
- http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7664e9282---fafurovajugejowifovo.pdfIn PDF document text
- https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/44622325d5019622cfdb8c6d12c17cbb/45542481652.pdfIn PDF document text
- http://japanbizkorea.com/userData/ebizro_board/file/fekalojasutavopob.pdfIn PDF document text
- https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/628c23a450c303303bbbcb4f79fa5e0d/28773110399.pdfIn PDF document text
- https://www.tyrtaios.gr/ckfinder/userfiles/files/seriwikuwalanikagunubete.pdfIn PDF document text
- https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/e137c14172eb8887695bc47bd691114e/dizivogovefugiveg.pdfIn PDF document text
- http://hifitness.hu/userfiles/file/pemowenigemowupaxagoxotud.pdfIn PDF document text
- https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3c3f1dd6d---7180393941.pdfIn PDF document text
- http://przedszkolenisko.pl/userfiles/file/nizuz.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=bfuhs+date+sheet+2020+b.sc+nursingPDF 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_off0000dd1c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD1C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f52e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF52E	17272 bytes
SHA-256: `7a1b421450e0f1b8f95b34417b28a6ec230e5a8a11831b8b02dfea64e22a889e`
`font_02_sfnt_off00012222.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12222	11192 bytes
SHA-256: `17904c9d246caf29b96b95fa00a518050755640019d16583ffbb07b1c6c7f3c5`

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