PDF malware analysis — malicious · 2d7fd787468ae16d

MALICIOUS

PDF

82.3 KB Created: 2021-09-02 15:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 508a9e4b6ada086f02c73d5f27ba3c62 SHA-1: f5bd41f2f97c349113ea98a8f8f681b558fdd284 SHA-256: 2d7fd787468ae16dc056cfa027d45810a7617db63a6d599cb936fdda2020adc6

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to trick users into downloading a second-stage payload. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

Heuristics 7

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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://krisoc.ru/uplcv?utm_term=habitudes+for+the+journey+the+art+of+navigating+transitions+pdf PDF link annotation
- http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/detavoxowekoniwaka.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4648f27bce---12954495114.pdfIn PDF document text
- http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/fb3e8c23b72b4bbca287093a1ab2b82b/6383402166.pdfIn PDF document text
- http://maksimetall.ru/files/62349560479.pdfIn PDF document text
- http://gelateriacool.it/userfiles/files/8885143316.pdfIn PDF document text
- http://mbjarrahi.com/UploadedFiles/New/file/4514195194.pdfIn PDF document text
- http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/12217654674.pdfIn PDF document text
- https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/dakud.pdfIn PDF document text
- https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/04f8edc931ed575ebb22673fd8571215/refesasisezef.pdfIn PDF document text
- http://wahluenfty.com/userfiles/lebexita.pdfIn PDF document text
- https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b122eecb7d6---pojikadolax.pdfIn PDF document text
- http://tydafa.com/dafa/uploadfiles/20210708092838.pdfIn PDF document text
- https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/j8oqvj5aa269lrsarv743n520p/rimigebede.pdfIn PDF document text
- https://skyzoan.com/cake/beta/userfiles/file/geviwekawixepad.pdfIn PDF document text
- http://purofirstli.net/userfiles/file/ravun.pdfIn PDF document text
- http://lucidareemantenerepavimentifaidate.it/userfiles/files/lowivipamiguvom.pdfIn PDF document text
- https://falconshipping-uae.com/userfiles/files/leduwuzotajimimesekunom.pdfIn PDF document text
- https://x-software.cz/data/file/86431342128.pdfIn PDF document text
- http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ff781698a55---93968387049.pdfIn PDF document text
- http://fabiocaronearchitetto.com/userfiles/files/4250323923.pdfIn PDF document text
- http://slmj8.com/data/userfiles/files/kisabetazuxep.pdfIn PDF document text
- http://usa-ex.com/images/blog//file/82283365890.pdfIn PDF document text
- http://www.anclupnapoli.it/userfiles/file/xodijojogujupimolafuxu.pdfIn PDF document text
- http://okwmd.com/upload/fckeditor/file/89336159906.pdfIn PDF document text
- http://smcertificationservices.com/userfiles/files/99003919685.pdfIn PDF document text
- http://slenderclub.cz/ckfinder/userfiles/files/nafozuvexebola.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_off0000db15.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB15	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f327.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF327	17692 bytes
SHA-256: `750b3ed512c96887667c2f89d0a8b10ab6f5da14656bf4251b987b55af122cb8`
`font_02_sfnt_off000120ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120BA	11272 bytes
SHA-256: `b5ea349fae49c481aa502a1cda46a018d899f4f29466d4260008a37bb4c25524`

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