PDF malware analysis — malicious · ddc1bcda148e4939

MALICIOUS

PDF

74.4 KB Created: 2021-05-06 23:35:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11

MD5: cf526e6e61873f7a8e4c08c6f37b5e8d SHA-1: 04aa13888292b249aff5af2c6120f28961c62ce2 SHA-256: ddc1bcda148e4939fb31d468d07c003f960c1c0ccc5e51fe1cddeac7a8aecc91

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/51ueskm6v6oov7r70mmkpbglv2/40704437411.pdf In PDF document text
- http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608532b51e025---sosinozajisi.pdfIn PDF document text
- https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16072b83f598b5---xevawotixegikalesejedivab.pdfIn PDF document text
- https://micast.de/wp-content/plugins/super-forms/uploads/php/files/oiut6cpenob7qj5cqbj9p0pv1j/56860897578.pdfIn PDF document text
- https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/75mbt7riar0u3crik941i6of6f/sebepuretexobujiw.pdfIn PDF document text
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff3909fc38---xuxivetatanagubevifoxezo.pdfIn PDF document text
- https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/lpf7jjpi19dqq692uahldrkoah/80465255670.pdfIn PDF document text
- https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/f4c981a4c72bbdfae02facd236ad78b4/gopapewonuvilasugul.pdfIn PDF document text
- http://ebsenglish.net/_UploadFile/Images/file/55938092221.pdfIn PDF document text
- http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072566e67f02---boxivisexi.pdfIn PDF document text
- https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/3thdekvi7osguvk1skoj0gn5bc/rilisebele.pdfIn PDF document text
- http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2f2460d14---98707675978.pdfIn PDF document text
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/f73a4cc5643f73f97ba236c67137312a/95384541268.pdfIn PDF document text
- http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607790e22e572---bekojifotanosok.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160853f0e2e2dc---fibevifoba.pdfIn PDF document text
- https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/2704583826e9f87c765493c5a8cc293b/85453418461.pdfIn PDF document text
- http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3d3744e27---jogegokik.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=coloring+sheets+preschool+christmasPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dd24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD24	5156 bytes
SHA-256: `96a744f70398747b89c91d042f829f0b08aca3cc01624c1145ac8404ca875ed7`
`font_01_sfnt_off0000ee77.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE77	9484 bytes
SHA-256: `dfba2dc8b37689d6650d1f5e532a5fd766f2d02745dd230c149ab5cd601ca593`
`font_02_sfnt_off00010ec0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10EC0	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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