PDF malware analysis — malicious · 6b0357438be634c7

MALICIOUS

PDF

86.6 KB Created: 2021-07-04 00:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 56ae0fb4fd328decb8e069ab3909c5d0 SHA-1: 4bd29fe69f751127da2da8404bc4b4876b595242 SHA-256: 6b0357438be634c7e8de6d0424a66cbafcf9259007b7f2c24f9d4e50e5487661

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to trick users into downloading malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://taxiparga.com/wp-content/plugins/super-forms/uploads/php/files/ddecfb11d268871d3d9f0442923e5190/95035992957.pdf In PDF document text
- http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bd750eb75---91456991067.pdfIn PDF document text
- https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a59c6a5bb35---xadaxejo.pdfIn PDF document text
- https://fallsplat.se/file/34930246333.pdfIn PDF document text
- http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160760d2d0e09c---21613894817.pdfIn PDF document text
- http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16087f20f3fd9f---70383821920.pdfIn PDF document text
- https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b632a587756---gikodesarovogekoluxopu.pdfIn PDF document text
- https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/a546bb5020db9cefd38d8e195e16ed59/88744269363.pdfIn PDF document text
- https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/o79j888h1i7137h59devcfac14/80960752741.pdfIn PDF document text
- http://msamerica.net/clients/873634/File/50859673909.pdfIn PDF document text
- http://sosnovgeo.ru/userfiles/file/jilokugur.pdfIn PDF document text
- https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/03f54691b42ec0f28bd50f8263d0c51f/77001508116.pdfIn PDF document text
- https://dogathermalhotel.com/resimler/files/jibalasobixasedudaxejez.pdfIn PDF document text
- http://weifong.tw/fckimages/file/naxijiwibubuwugevitures.pdfIn PDF document text
- https://daquin-ferriere.fr/userfiles/file/bevumolinodevogaparenax.pdfIn PDF document text
- https://istanajp2.com/contents//files/72058461214.pdfIn PDF document text
- http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dced015d5b---daxebugarita.pdfIn PDF document text
- https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/ca50e0ff99570f101c2ba8a123875d3f/2710260283.pdfIn PDF document text
- https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/82a4e61c9161c06d8d5c5093e09e4c95/3567714567.pdfIn PDF document text
- https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/e58c5d6349ef09c98b2d6d5d439a4e1a/86528044029.pdfIn PDF document text
- https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/17ffdefe682b7113a9d62d2a5d9c3cf6/mimozusofijurolu.pdfIn PDF document text
- https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/b1a30ed5a6725b2bf6be9cdff6942e12/giluzajuvat.pdfIn PDF document text
- http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b45bfaf3a22---kijafosaxajisuvijeremi.pdfIn PDF document text
- https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742f9558d50---repowo.pdfIn PDF document text
- http://www.odnpoznan.pl/fotki/file/file/tekoxudujalamaxod.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=4th+standard+tamil+book+question+answerPDF 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_off0000ee19.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE19	11060 bytes
SHA-256: `55b4336e0ae588f39a5ecf76eace3311af966604b5071343ae5effe48b5bd2b4`
`font_01_sfnt_off00010770.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10770	17368 bytes
SHA-256: `723d549231a4726d5919bbe6a0c4d5f5f45adbb25e7461e0d9067c4bf15e6e20`
`font_02_sfnt_off000134ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x134EE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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