PDF malware analysis — malicious · cdf30a566c58c2f0

MALICIOUS

PDF

82.4 KB Created: 2021-09-02 18:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: ae4ebec45e2086b472574045538a16ed SHA-1: c99d28f1b7a931971d05ca1fe16d16c47071b450 SHA-256: cdf30a566c58c2f0e985181da11f7036b2094dda31789b9aa932ea17a66e1f35

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and link farms pointing to various domains, suggesting it's designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the presence of PDF-specific heuristics and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://chcial.ru/uplcv?utm_term=neem+tree+information+in+marathi+pdf PDF link annotation
- https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/qn5vuansjielo7289fcotv7e7a/vadixaxi.pdfIn PDF document text
- http://ahcxdq.com/uploads/file/111152447477.pdfIn PDF document text
- http://flagrant-desir.com/userfiles/file/51467652831.pdfIn PDF document text
- http://quaker1960.com/clients/3/34/346d0055920ff30d27c63167e405b0e7/File/52498298601.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a4f0c8967---wopize.pdfIn PDF document text
- https://afmiletisim.com/resimler/files/70430953423.pdfIn PDF document text
- http://bertrandetgastineaudesigners.fr/userfiles/file/bilufusuxikofarapobi.pdfIn PDF document text
- http://pkynfe.net/userfiles/file/vijetevi.pdfIn PDF document text
- https://www.prieur-equipement.com/ckfinder/userfiles/files/lobupesajevolum.pdfIn PDF document text
- http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c01b8dd5468---kefirago.pdfIn PDF document text
- http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ba7a9bca2---66116240320.pdfIn PDF document text
- https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/gjgpu5eoqcseahghfein6be0nc/tibewotutumo.pdfIn PDF document text
- https://lensprovn.com/ckfinder/userfiles/files/xerufulagoduvupini.pdfIn PDF document text
- http://pamatudarbai.lt/ckfinder/userfiles/files/99285632631.pdfIn PDF document text
- https://shellserva.nl/docs/Image/file/58743723933.pdfIn PDF document text
- https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070acfc9b4cc---fipewabowagumex.pdfIn PDF document text
- https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/cd9318f0a33593b18644066cc867d334/90942320648.pdfIn PDF document text
- http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5961235ec---83421229765.pdfIn PDF document text
- http://kppzp.pl/userfiles/file/7869974260.pdfIn PDF document text
- https://girisimhaber.com/uploads/file/33744742576.pdfIn PDF document text
- http://gostinica-domodedovo.ru/files/riruxuv.pdfIn PDF document text
- https://my-natural-style.net/upload/files/78782587038.pdfIn PDF document text
- https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/0qe97s758vsfcfcqpn5uaqvvu7/zixejewimiwirixexu.pdfIn PDF document text
- https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff93d45e2d---95151785470.pdfIn PDF document text
- http://opuspointpartner.com/ckfinder/userfiles/files/99897572137.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_off0000da8e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA8E	18960 bytes
SHA-256: `3dc626685ba4ec43985fe1b10910e976a816113fd375e62da19164aeed4e8cc2`
`font_01_sfnt_off00010c1c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C1C	10524 bytes
SHA-256: `d0ed71b5069e32109b27911c7f2b926de16bca0cdb7632a815224a65102921fd`
`font_02_sfnt_off000123cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x123CD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.