PDF malware analysis — malicious · 27dedc81e4cdc8d0

MALICIOUS

PDF

128.3 KB Created: 2021-07-27 05:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 5d3fb1be4fd9c88e70ba52ef18a12d08 SHA-1: 6c447a800472c7459092647d176c5b3c8862657f SHA-256: 27dedc81e4cdc8d0199b857ce1fcde4d943ab8bdb69394dbf135d43b9f3bac29

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress sites and other disposable hosting, likely intended to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics suggest an attempt to lure victims to external sites for further exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9946

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://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/66686248065.pdf In PDF document text
- https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4ec09fdc1082c4284edb8ce08de05ac4/punatebir.pdfIn PDF document text
- https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071580544b0d---35352838511.pdfIn PDF document text
- https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/aab2ce19fe60b31540f15e66359af7f6/28704802160.pdfIn PDF document text
- http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3228df75a---41065923871.pdfIn PDF document text
- http://www.asap-recruitment.net/upload/file/pajubinukowufidof.pdfIn PDF document text
- https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/60039068518.pdfIn PDF document text
- http://itps-group.com/uploadfiles/file/dalibakivaxewudanusizovud.pdfIn PDF document text
- https://thietkewebseo.com/webroot/img/files/83202604993.pdfIn PDF document text
- https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/f29f88d7ac0fa4eb4a7008c57ecc3f8a/36149127003.pdfIn PDF document text
- https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/a8309be3fd28c8838d91999e75614a8d/2199107675.pdfIn PDF document text
- http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/qc3lojphd9uoli2rnb597isjr3/xagiwonolaxadofonilarebev.pdfIn PDF document text
- https://alakharia.com/public_html/userfiles/file/dalozoxe.pdfIn PDF document text
- https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/auf8vedplb8m1r9lendgth09n4/voxitepaxukelinonebavo.pdfIn PDF document text
- https://cometsecurity.in/admin/userfiles/file/woxutujexivodevilulu.pdfIn PDF document text
- http://kleni.cz/userfiles/file/5912382670.pdfIn PDF document text
- http://seritour.com/rsm/files/nezawidej.pdfIn PDF document text
- http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/m9ndcophrp98mkt3p78jv0irp3/4713580294.pdfIn PDF document text
- http://healingtown.org/userData/board/file/27659951200.pdfIn PDF document text
- https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/l03s1h9bkca8vrsufuennjl541/34023754091.pdfIn PDF document text
- https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/728be048d9fafdd5c7ed4cc7e758626d/puzidifunowemulixegise.pdfIn PDF document text
- http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5b43312c1---gijukevukiwosekixedaku.pdfIn PDF document text
- http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609875699d14b---67446487826.pdfIn PDF document text
- https://protradingindia.net/userfiles/file/30388399664.pdfIn PDF document text
- https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/5e904f0deb510654fbd42a1a45d563ea/pekikiwataso.pdfIn PDF document text
- https://0a3exp.com/upfiles/editor/files/87691076864.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=chevy+uplander+service+manualPDF 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_off000192fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x192FB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001ab0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1AB0D	18064 bytes
SHA-256: `345f38def4c1f6454e15e267cbb42a1ced8d27638d94dd8bc81bbcfb0415195c`
`font_02_sfnt_off0001d9d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1D9D9	10872 bytes
SHA-256: `7d274ce28bd8bf0f3a6b8d84eae554522db0e99b21cc0aca9a2f1c021d38291d`

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