PDF malware analysis — malicious · b575983ea3392676

MALICIOUS

PDF

80.4 KB Created: 2021-09-17 22:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 607c80b2ffb1d3e7850a9699ac02aaed SHA-1: 513747801f65ea5a138425bd886735a882f63af7 SHA-256: b575983ea3392676f3719883036a532327724b1220934bae120dac182873d787

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to other PDF files hosted on compromised websites or disposable domains. This behavior is characteristic of phishing campaigns or malware distribution networks, aiming to lure users into clicking malicious links. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.6313

Heuristics 5

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
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://archism.ru/uplcv?utm_term=closest+love+to+heaven+watch+online PDF link annotation
- http://ocean-ex.com/images/blog/file/28263319611.pdfIn PDF document text
- http://innersolutions-uk.com/file/sevekojovoropusopuba.pdfIn PDF document text
- http://filipdegreef.be/uploads/files/nusuripede.pdfIn PDF document text
- http://bdsps.org/slbdavbatala/userfiles/file/tasegujipejanijitibam.pdfIn PDF document text
- https://efficimm.fr/userfiles/files/bixotugidevinowenavitad.pdfIn PDF document text
- http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/xogisokujopemimab.pdfIn PDF document text
- http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/duh63hrcfn6gik5n6f90bju0lu/kebuzidubevupuruboruwo.pdfIn PDF document text
- http://assytekservizi.com/userfiles/files/bozutalenasa.pdfIn PDF document text
- https://mimpidia.com/contents/files/48176699464.pdfIn PDF document text
- https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/7d487fe4c055384cdae4ece73fef1ee6/34192274623.pdfIn PDF document text
- https://gionggiacam.com/ckfinder/userfiles/files/76257430418.pdfIn PDF document text
- http://theonejsc.com/userfiles/file/jasowera.pdfIn PDF document text
- http://keacg.com/upload/files/wisedu.pdfIn PDF document text
- http://mylodge-naoshima.com/images/blog/file/10253844334.pdfIn PDF document text
- https://xn--49st2et51duvk.com/upload/files/64738764804.pdfIn PDF document text
- http://abwingsde.com/uploads/files/10955082511.pdfIn PDF document text
- http://smogy.ru/files/files/resez.pdfIn PDF document text
- http://cabinet-blin.fr/ressource/site-image/files/fawaxitepawivawixurodiwux.pdfIn PDF document text
- http://espicycooking.com/files/file///45694062173.pdfIn PDF document text
- http://tiendanatacion.com/noticias/files/tunapaxegisuripokapob.pdfIn PDF document text
- https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/8srko8lqgj1u9ljpa1viqmuh7t/27772927275.pdfIn PDF document text
- https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/627300335e68bae01dbcda801728be6c/44887435188.pdfIn PDF document text
- http://pro-group.ru/userfiles/files/29991514253.pdfIn PDF document text
- https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/0snl9v10kbs3tn74vo7n15cb5n/vagew.pdfIn PDF document text
- http://findacommodity.com/upload/file/kipewonelidenun.pdfIn PDF document text
- http://madmojo.com/fckupload/file/70258621148.pdfIn PDF document text
- http://kaushalacademy.org/ckfinder/userfiles/files/dobexudiwokawa.pdfIn 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_off0000e64f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE64F	17520 bytes
SHA-256: `ddd5196130864322f8aaa6ac31532ff91ee9cbc3b0d9b64aabd82b1ceb621b2a`
`font_01_sfnt_off0001132a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1132A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012b41.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B41	10408 bytes
SHA-256: `c56fad6c03b946c9b2c03d8b51b623e7861f266605694645680206a4d7ba6a8e`

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