PDF malware analysis — malicious · 8b82c02641dde820

MALICIOUS

PDF

99.7 KB Created: 2021-07-05 09:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: a359d2e374378ba7d597a836bebc5945 SHA-1: 7471e69e5b6b7fd3cd344c2453ba4bae4586ba11 SHA-256: 8b82c02641dde820ef6d9eec15929cc207ef38602c1538ff5af54f361b9611ac

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the structure and URL analysis strongly indicate a phishing or malware distribution lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9681

Heuristics 6

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.
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://cepsagibyachtfuels.com/images/photos/rabeluzotekip.pdf In PDF document text
- https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/665e405c1edc20617eb76938ec571aac/24281623511.pdfIn PDF document text
- http://fine-cottage.ru/userfiles/file/zutojogowixonem.pdfIn PDF document text
- http://ip-golubev.ru/ckfinder/userfiles/files/15028829291.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4754ee089c---79662901385.pdfIn PDF document text
- https://ecoretras.com/file/78999911709.pdfIn PDF document text
- https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/402s03u434an0q3vh87o6o1dha/43262819454.pdfIn PDF document text
- https://topclassgardening.nl/images/file/21507297314.pdfIn PDF document text
- http://urgentcarepb.net/userfiles/file/50019162259.pdfIn PDF document text
- https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/0f3b0bdaf8a33b403fd2e895d3346721/72984517730.pdfIn PDF document text
- https://o-dance.com/upload/files/tigifofubezabara.pdfIn PDF document text
- http://turagent007.ru/userfiles/file/nopexipakuxi.pdfIn PDF document text
- https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607424faeb286---samavosufobibi.pdfIn PDF document text
- https://tedvandergulik.nl/userimages/file/marikegilenexogafosokejov.pdfIn PDF document text
- http://velocimapper.com//webfiles/file/tusik.pdfIn PDF document text
- http://www.fashiongale.ro/userfiles/files/litiziruzo.pdfIn PDF document text
- https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/4ab230b6b05bbd9cb8466f8d1054d1ef/13221888452.pdfIn PDF document text
- https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/95ae1a31a1d73f96ccc8ecdd1fb01894/nigedumasupomowap.pdfIn PDF document text
- https://accuratesearch.com/userfiles/file/72563254828.pdfIn PDF document text
- http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609408488dc7b---17128457280.pdfIn PDF document text
- http://glina-master.ru/admin/ckfinder/userfiles/files/koxajozibog.pdfIn PDF document text
- https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/r1bla0akd4nl85j9t6fak1vhp1/17849480813.pdfIn PDF document text
- http://musorcentrum.hu/files/article/file/nuwodilokaka.pdfIn PDF document text
- https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/dbcc60efc27b38f924c9b66a23fa390c/6585552517.pdfIn PDF document text
- https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/s130ut7dc87l774mvh7o0j02j7/sufozokuvot.pdfIn PDF document text
- http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/4sk5qovfmeu5ak52pdbopq2hq3/jafotogaxotata.pdfIn PDF document text
- https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/e6b883d28a2c81a3ab9d898eee1a9748/54265496065.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=translucent+meaning+in+sciencePDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00011cfe.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x11CFE	18500 bytes
SHA-256: `e19fb6237a497942a7420c2d363f1764f0027e5bc17d863dca808a49db457728`
`font_00_sfnt_off000104ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104ED	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000139ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x139EA	10516 bytes
SHA-256: `29eee72cd82d3479b65f8f4cf52ca3365e5bbd30ed55d2b0535c431afbc79c65`
`font_03_sfnt_off000151ce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x151CE	17268 bytes
SHA-256: `9ed828837aa1b1ee58bccbbfc42709259eee166fd96778970b7c8158673f43ee`

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