PDF malware analysis — malicious · 992c7cba57542931

MALICIOUS

PDF

80.8 KB Created: 2021-09-21 07:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 7bde22dba3b4364bd8968983ee49b5c0 SHA-1: a2dded5b94754eeb3fb7c878e50c99350d9563c3 SHA-256: 992c7cba57542931eac00b899d90188271e965e6a5b3866bacdb7e11ef3ab129

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to compromised websites or disposable domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest a phishing or malware distribution intent. No scripts were extracted, but the structure and URL patterns are consistent with phishing lures.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://medvor.ru/uplcv?utm_term=speed+post+cost+in+india PDF link annotation
- https://zahidnawaz.com/UploadedImages/image/39362984215.pdfIn PDF document text
- http://allnatureint.com/userfiles/file/sagutodojisavix.pdfIn PDF document text
- http://bananamusic.tw/uploads/files/202109121031102533.pdfIn PDF document text
- http://restauraceeverest.cz/userfiles/file/47250614222.pdfIn PDF document text
- http://abwclayton.com/uploads/files/kuvibekosemeret.pdfIn PDF document text
- https://n-vv.dk/userfiles/file/65721231122.pdfIn PDF document text
- https://ceiling.holcom.vn/webroot/img/files/bivosilobubeladibutovozaw.pdfIn PDF document text
- http://parejalecaros.com/adjunto/upload/fck/files/49100973861.pdfIn PDF document text
- http://www.petercar0937494634.com/upload/img/files/85711592339.pdfIn PDF document text
- https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e94390f97b---7883058810.pdfIn PDF document text
- https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/241b2279cf42f5a8ea58612c3c4d0a0c/59617824679.pdfIn PDF document text
- http://studiocommercialedelpiano.it/userfiles/files/wonigidelunezebuduzara.pdfIn PDF document text
- https://castilloexterior.es/ckfinder/userfiles/files/kadesalodanamupulinurigix.pdfIn PDF document text
- https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/27cc900792dcbe2e075d2fcbbab649f6/4645525427.pdfIn PDF document text
- http://genarchi.com/data/temp/file/93014353084.pdfIn PDF document text
- http://blesk-stroy.ru/userfiles/files/20117859582.pdfIn PDF document text
- https://hongmao.tw/uploads/files/202109111112161278.pdfIn PDF document text
- http://birnagarcollege.in/userfiles/file/laminesivajovej.pdfIn PDF document text
- http://modaxch.com/userfiles/files/giguwaxepodifizedumix.pdfIn PDF document text
- https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/1b99bfec14ee53a4d43de257a52aa004/vixowedukalalavumad.pdfIn PDF document text
- http://thegioituigiay.net/uploads/files/52280211258.pdfIn PDF document text
- http://suranareecommand.net/UserFiles/File/5589990213.pdfIn PDF document text
- http://tuanlongland.com/upload/files/wimupebokonu.pdfIn PDF document text
- http://hijoin.hu/editor_up/rekalixiseridozepaj.pdfIn PDF document text
- https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a9c94341a---68600637197.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_off0000d837.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD837	17628 bytes
SHA-256: `974c2a92c1975d8e184a5f419ad305dc1a9a92d795c8fc0265fb4fd52f581e1d`
`font_01_sfnt_off0001060f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1060F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011e26.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E26	10436 bytes
SHA-256: `194a90cecbcea90d9614b48aaa6fcd1e54cdd7d9c30a38dee0085f91558a16af`

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