PDF malware analysis — malicious · b43a7c2840c51211

MALICIOUS

PDF

78.9 KB Created: 2021-08-16 18:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 61d0251cdeb308c935f454b20f754db1 SHA-1: 16c826170329aaf15af79dbdc769662fca79f37d SHA-256: b43a7c2840c512111dfaf9d22d7372906effcfaed5e8691f5c180ba48a44c287

104 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites acting as a link farm. The ML classifier strongly indicates maliciousness. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely to facilitate further exploitation or download additional payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

Heuristics 6

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/8rfkk93v1s10ju6rgkq6j61gde/lefigawadadanuwuzazemurub.pdf In PDF document text
- https://allcreaturesinc.com/files/files/23614568984.pdfIn PDF document text
- http://riasztoszolnok.hu/admin/fck_upload/file/50898400017.pdfIn PDF document text
- http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae43c847779---zetofu.pdfIn PDF document text
- https://kfmaccounting.com/webroot/img/content/files/18170645007.pdfIn PDF document text
- https://pirkitpadangas.lt/ckfinder/userfiles/files/85137655619.pdfIn PDF document text
- http://hkxhjfc.ltd/uploads/files/20210630174953.pdfIn PDF document text
- https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1d7748feb---lolikixidifabowuna.pdfIn PDF document text
- https://moraure.net/js/ckfinder/userfiles/files/lixiba.pdfIn PDF document text
- https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/813b5a5f5b36bf42a7a0d4239bcdfcee/28499881136.pdfIn PDF document text
- https://jordan.si/dokumenti/file/fedelipekux.pdfIn PDF document text
- https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/0s1a3hcsojeg60ant5r75n9vg7/wotelokesidanunaxalisem.pdfIn PDF document text
- https://unique.global/wp-content/plugins/super-forms/uploads/php/files/7ccac1391ea62fbc339f6d613c26fecd/98623734240.pdfIn PDF document text
- https://harrisitalia.it/uploads/file/71317229.pdfIn PDF document text
- https://investincarpathians.eu/app/webroot/media/files/rirokur.pdfIn PDF document text
- http://massarentearchitettura.com/userfiles/files/zivalelejo.pdfIn PDF document text
- https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/81475d6225c4934bc7a0f9bdee9eaa31/bofaxegol.pdfIn PDF document text
- http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c983a60befd---48454506628.pdfIn PDF document text
- https://inwestorfinanse.pl/userfiles/file/fafebazakef.pdfIn PDF document text
- https://angkoronetour.com/userfiles/file/dofowewuvedona.pdfIn PDF document text
- http://ngocvietbungalow.com/upload/files/mobilotabesunibolo.pdfIn PDF document text
- http://zcapitalcrm.com/app/webroot/uploads/files/badivawijo.pdfIn PDF document text
- https://kozmetikadunakeszi.hu/userfiles/file/60766173866.pdfIn PDF document text
- http://atreve.eu/ubezpiecz/obrazy/file/fegesepikagijunu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+see+ba+2nd+year+resultPDF link annotation
- 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_off0000d011.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD011	10700 bytes
SHA-256: `f51e151c943efa64486dcca1b95de8c279e8cbd6b7b3ddd138da98d92267875d`
`font_01_sfnt_off0000e8e0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8E0	17508 bytes
SHA-256: `da7cbaf637c160a88bbb3f1965407a15df71cc416c7623347810fad9901cccdf`
`font_02_sfnt_off00011628.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11628	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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