PDF malware analysis — malicious · 7e3b33590589d049

MALICIOUS

PDF

74.5 KB Created: 2021-09-05 06:36:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 15cd7a0a6038a2726cee23824d4fd291 SHA-1: f3a4bfe2d2375b1b2529d66cf9dc6beb6ec083c0 SHA-256: 7e3b33590589d049b40a6bf86f780c7ac75ffc88a7348c1834b9c039ff209ad1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

Nyx PDF Classifier malicious score 0.9934

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://allytemp.ru/uplcv?utm_term=band+saw+safety+manual PDF link annotation
- http://nbmounts.com/userfiles/file/1629929445.pdfIn PDF document text
- https://manuscripthandler.com/userfiles/file/mabovolovivakiwo.pdfIn PDF document text
- https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/6g3uujk582321tn32jlnqlail2/36615954762.pdfIn PDF document text
- http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/zulugemepuja.pdfIn PDF document text
- http://dent-pro.cz/pic/file/45066600625.pdfIn PDF document text
- https://radekslodkiewicz.pl/files/file/punimawifanuz.pdfIn PDF document text
- https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/xumuwojofusavojupilir.pdfIn PDF document text
- http://sumisaedu.com/FileData/ckfinder/files/20210719_223F9D20A530DFEE.pdfIn PDF document text
- https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/ld0o6em2o7utof9ntq1s32r1a5/vupulikukowufuk.pdfIn PDF document text
- http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac33a9a5cd5---87909723987.pdfIn PDF document text
- http://kzlo.pl/fotki/fotki/file/pajarumag.pdfIn PDF document text
- http://andrelandberg.com/userfiles/file/zilebute.pdfIn PDF document text
- https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/053282570a7d4f9dadd45fe862eafafa/zujirupiban.pdfIn PDF document text
- http://kath-kiga-bw.de/bilder/berichte/file/33170914377.pdfIn PDF document text
- http://omegapizza.net/uploads/files/32994932576.pdfIn PDF document text
- https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/24c256bf102064d2886899db44980a39/jutoxukadifures.pdfIn PDF document text
- http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1538a7f2f---zeribezazuwutukixi.pdfIn PDF document text
- http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161248af350156---tivifatiparutivutiji.pdfIn PDF document text
- https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/43903ea794ac5c43bda2cbb31e530eb8/xonibodixuripenezep.pdfIn PDF document text
- https://whereestar.com/marinarubicon/admin/file/tifixobemewazofi.pdfIn PDF document text
- https://www.gullyracing.it/admin/ckfinder/userfiles/files/kunuwenobapo.pdfIn PDF document text
- https://lawyerupsmart.com/tempimg/file/80535635553.pdfIn PDF document text
- https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/l78ve3b6gnvanp00q87nrrrfj4/kebozuzujopegaramixax.pdfIn PDF document text
- https://renewone.de/files/fujujuxesaxukipixuso.pdfIn PDF document text
- https://ever-progress.com/upload/files/mozewem.pdfIn PDF document text
- http://mishor-uvk.com/uploads/files/1344833783.pdfIn PDF document text
- http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16087b13bd0b4e---7230257799.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_off0000c171.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC171	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d983.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD983	16504 bytes
SHA-256: `b80d75f7d0f54fb4f5834850b90640ace448e0af7123cd353c5bd79b55b88dc8`
`font_02_sfnt_off0001042d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1042D	10556 bytes
SHA-256: `5a70657b98bf88e2881778881d3744ec207af2287d3f8e290542d3e5060600b3`

Open this report in the interactive analyzer, or submit your own file for analysis.