PDF malware analysis — malicious · 202f03c67cb0282b

MALICIOUS

PDF

111.6 KB Created: 2021-06-27 22:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 2cd2ad7fa5c6ac52431aef4f9ee68769 SHA-1: ea495d47329a03c172fa25418fdc25f549efb798 SHA-256: 202f03c67cb0282b6f73fde4e6ae6fd364e9dd0880c507ef2356c88b5ab05576

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute malicious content. The document body was unreadable, but the heuristic firings strongly indicate a phishing or malware distribution attempt via embedded URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9931

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://jkohut.pl/file/tofurisur.pdf In PDF document text
- https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608959bb2e3ec---90795537028.pdfIn PDF document text
- https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/2d7d18ed79709eabd23943c89936f9af/kadalanepa.pdfIn PDF document text
- https://naoshima-habitant.com/rezajoxopukozafajizideb.pdfIn PDF document text
- http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070956a9c576---72107983711.pdfIn PDF document text
- https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/f2c9c98523fe9542fb66ba0be56fc7e4/44325577718.pdfIn PDF document text
- https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/de7c235c17fefefd887d5fcae6be648f/kawonipinavesipazaxez.pdfIn PDF document text
- http://chayka-svg.ru/files/mizisijazozulufutil.pdfIn PDF document text
- https://iamtimeshare.com/userfiles/file/7474116690.pdfIn PDF document text
- https://leosservices.com/userfiles/file/mixalexomote.pdfIn PDF document text
- https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/qrk8k8ka5velkcgc506b5uktgp/6075749867.pdfIn PDF document text
- https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af1074e3c9c---64914495887.pdfIn PDF document text
- http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/nudqku2qmh0i4kdoi9k8lfbcqg/23670052738.pdfIn PDF document text
- http://www.aqsclimited.com/EditorImages/file/68660967195.pdfIn PDF document text
- http://beloezoloto.ru/userfiles/file/sipeterasifetepuxiji.pdfIn PDF document text
- http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f16901684---23871551698.pdfIn PDF document text
- http://antifftech.com/uploadfile/file///2021052503214410.pdfIn PDF document text
- http://chronocertif.com/userfiles/file/vefubiraraw.pdfIn PDF document text
- https://palcev.ru/userfiles/file/71839736413.pdfIn PDF document text
- http://gfhs1978reunion.com/clients/56625/File/2300607017.pdfIn PDF document text
- https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/11bf3f5009fe293f6fa25eb35b28a723/nebodenenumesuxuzerefov.pdfIn PDF document text
- https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/770a205cd9463a3d80d41737d3052d15/tegaxanogu.pdfIn PDF document text
- http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/bf6c006bd9f07c142688a5c14f8a5d4d/rodafajagone.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f25999cb38---70289415332.pdfIn PDF document text
- http://maroba-zirndorf.de/file/zonupikule.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=beckman+coulter+z2+particle+counter+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_off00014ba8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14BA8	10792 bytes
SHA-256: `9863865d8671aa2e28889605686c6df877f7d38401bc4d479e288eddd94ab78a`
`font_01_sfnt_off00016497.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16497	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00017ca9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17CA9	18748 bytes
SHA-256: `c4f188a8f8054bb7ae33fb4f001c801e3330aa344c00acd12d294b7a384c7c6c`

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