PDF malware analysis — malicious · cc3b02ecd3a832cb

MALICIOUS

PDF

82.5 KB Created: 2021-08-29 09:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: c02ad36632ab48ff3e8255ae0712f0e1 SHA-1: 262e2ccd333ac25f20d4d4d83ec2d368b1d4e22e SHA-256: cc3b02ecd3a832cb35e9c16a100fb5d073b4eb55255085a5684f50a7a1b46524

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect the user to a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

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://queure.ru/uplcv?utm_term=text+file+convert+to+pdf+file PDF link annotation
- https://henseltech.cz/userfiles/file/20107966592.pdfIn PDF document text
- http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/tavojolowaworujejeso.pdfIn PDF document text
- https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c81772528c---gomek.pdfIn PDF document text
- https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607256d167b3e---ruritusunukusunosijod.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608acde56731a---70478271286.pdfIn PDF document text
- https://dalilak1.com/userfiles/file/dilufuzugigigoza.pdfIn PDF document text
- http://teusz.pl/UserFiles/file/japevalumipevalozelemivav.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b8762bb48.pdfIn PDF document text
- http://eko-inwest.eu/upload/file/89078486156.pdfIn PDF document text
- http://z-sinpro.com/upload/files/83274091380.pdfIn PDF document text
- http://dytac.hk/userfiles/82827391478.pdfIn PDF document text
- http://www.kroonzuivel.nl/ckfinder/userfiles/files/bamugatelunajuzive.pdfIn PDF document text
- https://spacio.hk/attachment/file/43882859434.pdfIn PDF document text
- http://fine-cottage.ru/userfiles/files/39167411863.pdfIn PDF document text
- http://mashhadgardi724.ir/basefile/mashhadgardi724/files/1839927143.pdfIn PDF document text
- http://thebeautyofdesign.nl/ckfinder/userfiles/files/xewamanusejeji.pdfIn PDF document text
- https://pharma-tools.eu/galeria/file/kekajixidi.pdfIn PDF document text
- https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b49b42f1b---5524049134.pdfIn PDF document text
- https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b67c9845a---wazuxi.pdfIn PDF document text
- http://caphegiabao.com/upload/fck/file/87797120473.pdfIn PDF document text
- http://interreg-ipa-husrb.com/downloads/77831108048.pdfIn PDF document text
- http://jncs.kr/page_data/file/20210518053141.pdfIn PDF document text
- https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/01294e033a4093177b3dc485a7856242/1794401257.pdfIn PDF document text
- http://jlsxjy.com/right/UploadFile/file///2021080309550273499.pdfIn PDF document text
- http://fotografieindex.nl/images/uploads/xiwiji.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_off0000dc63.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC63	10416 bytes
SHA-256: `d23e8fbdf23c11be28b6ce064316000f7d86adbda54992ef4eecc8dc2b247fe9`
`font_01_sfnt_off0000f419.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF419	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010c2b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C2B	18208 bytes
SHA-256: `4fdb2b79cca46d42e00fc7346520c30fa3b9ed12b6927ecb1ccd85d8dd927b5a`

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