PDF malware analysis — malicious · 054babd2629700c4

MALICIOUS

PDF

86.4 KB Created: 2021-07-04 13:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 90b5773d4a68c54e680306e74f78c7fe SHA-1: e8cb6da815fbe702aa3bdb40ee5a7cdb62f31dba SHA-256: 054babd2629700c43f69883bbb164f8ed7290f91cf6cd3c2b2582cf4336a2bfb

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to disposable hosting or compromised WordPress sites, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was unreadable binary data, but the prevalence of suspicious URLs is the primary indicator of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9819

Heuristics 5

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://garglob.ru/uplcv?utm_term=a+quiet+place+part+2+full+movie+free+watch PDF link annotation
- https://ehlibeytalimleri.com/resimler/files/23241737599.pdfIn PDF document text
- http://ozdoby-betonowe21.pl/Upload/file/75995186545.pdfIn PDF document text
- http://imaginove.eu/data/Files/memizuvifeno.pdfIn PDF document text
- http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608338559978b---60698884785.pdfIn PDF document text
- https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d5032c81afa---42280707142.pdfIn PDF document text
- http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607246a55f56a---35785960934.pdfIn PDF document text
- http://zabradli-znerezu.cz/userfiles/file/87762516223.pdfIn PDF document text
- http://akademia-jedenastka.pl/zdjecia/fck/file/41876208160.pdfIn PDF document text
- http://fujiya-la.com/uploads/files/valopatotafet.pdfIn PDF document text
- https://aduanaldelvalle.com/userfiles/file/dimaxezebixumed.pdfIn PDF document text
- http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b53a4f02de---sanaxigan.pdfIn PDF document text
- http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160926a392a081---vifijavidiwukuxen.pdfIn PDF document text
- http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1dafef350---wubumutidawuwalo.pdfIn PDF document text
- https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/c3d08c163d6b99f67501a312aae94100/60029398227.pdfIn PDF document text
- https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/lqerf17iqjhfp893st91ftdru3/xumegidem.pdfIn PDF document text
- http://chinajessie.com/seadata/data/uploads/img/file/162461996069.pdfIn PDF document text
- http://jfe.hk/userfiles/minufijedatijokilowid.pdfIn PDF document text
- http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/b28ea98c49cafd8ab1a38627f15eeea7/57809471116.pdfIn PDF document text
- http://cuuhoatudong.com/upload/files/daxumex.pdfIn PDF document text
- https://fanaf.com/article_ressources/file/wifubulexesewusuxakoruju.pdfIn PDF document text
- https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/dcf4bdd71c75a2f6d55fca59143194d0/dapukodutezagadunakutul.pdfIn PDF document text
- https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/h7ln5hcmqj8fvs77g677jhlt9f/sakijasagatedenizijujop.pdfIn PDF document text
- https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/68a5e5d0d79e2a94b386f37366ac779c/93881982599.pdfIn PDF document text
- https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/htcalutct8ma99p0bl67tr580v/68733302771.pdfIn PDF document text
- http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2d165af4a---wepekoz.pdfIn PDF document text
- http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160757e552929f---30020581586.pdfIn PDF document text
- http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/uuufuoonke54i9o2lvi6m304f7/kanusapetasadasowuxopi.pdfIn PDF document text
- https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090d11418062---puwamebatugokidijaguzilix.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_off0000eba4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBA4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000103bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103BB	10972 bytes
SHA-256: `c572e077b858bfd059fd61a3f1666e50e5baa7974529e62cefa02e42eda6ffa3`
`font_02_sfnt_off00011d4e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D4E	17064 bytes
SHA-256: `baa6497bad946e14be0f2c5c1e2a1ae7f60fde01f86f322eef7331105a6f4408`

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