PDF malware analysis — malicious · 54f002418448f523

MALICIOUS

PDF

79.3 KB Created: 2021-09-07 07:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 084d28bee2931ce14d255ca259d0ab60 SHA-1: 5d1a61cacb0306ee8431a35829290395a799f33d SHA-256: 54f002418448f5231e6ff4d8c90f1bd46acdff62572de6f171122e43fca92205

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a probable phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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 http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/161150ae87fb60---fogarurorebalivusek.pdf In PDF document text
- https://myphambambi.com/webroot/img/files/gelagut.pdfIn PDF document text
- https://bibliothequedesarts.ch/ckfinder/userfiles/files/10839443568.pdfIn PDF document text
- https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/d777f91ef5ccb34186037b8a7fe38f92/gewozamibopafave.pdfIn PDF document text
- https://vnjhanoi.com/upload/files/70324601914.pdfIn PDF document text
- https://krono-original.vn/Images_upload/files/45238247059.pdfIn PDF document text
- http://wagnerpc.com/userfiles/files/13558483589.pdfIn PDF document text
- https://berbagiangka.com/contents/files/revuviwudokod.pdfIn PDF document text
- https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/qgsf66jcqas02lne5tbp8gm61e/zazesup.pdfIn PDF document text
- https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/f6b6cbac701eec332f15fd31d582c467/foxukafer.pdfIn PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16099619bd2256---tujetopewafefe.pdfIn PDF document text
- https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed9a4db8a63---29058713022.pdfIn PDF document text
- https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/8kpajls4ba5d2jm53k7m74kvdj/67202998307.pdfIn PDF document text
- https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/a8e177d2e498c8a4d7fb0d693fd75e19/1439133664.pdfIn PDF document text
- https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/8u7g3ro39s0tc39rbjt1i0fi05/gafivutenug.pdfIn PDF document text
- http://quickvideo.nl/userfiles/file/naretafoxasekejado.pdfIn PDF document text
- http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161207604123cd---31897380934.pdfIn PDF document text
- http://arcomproltd.com/userfiles/file/61441184241.pdfIn PDF document text
- https://tivicom.vn/upload/files/remidalikekovedozekixapi.pdfIn PDF document text
- http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa95513ef0c---nidapi.pdfIn PDF document text
- https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/dd255f39c54ebc503cdff3e85e640309/43949891484.pdfIn PDF document text
- https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/7248fd807de54b7300a3c86cbb104446/xuzijorijorajokifujipubu.pdfIn PDF document text
- http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160820af8092c0---nivipu.pdfIn PDF document text
- http://hasici-pristroje-eshop.cz/files/file/ronalosotepatupokasize.pdfIn PDF document text
- http://balie.overeembv-profielen.nl/upload/files/54717992912.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=html+notepad+codes+pdfPDF 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_off0000c4f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC4F9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000dd0b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD0B	22204 bytes
SHA-256: `ebd0b3920a92a171e93210671aad95a1be56a622fa76c129b56983ffb3726e6f`
`font_02_sfnt_off0001174a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1174A	10580 bytes
SHA-256: `5abe6ff869a91eb70370964bed6135e1f993e7a5104d999e540604321b683de7`

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