PDF malware analysis — malicious · e22053b8480a30b9

MALICIOUS

PDF

76.7 KB Created: 2021-09-01 05:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 831d8858eca91d4ad17d6be4451318f1 SHA-1: 3b0e267367e4b0ddf77176a7bff8fd670f5a6a47 SHA-256: e22053b8480a30b947c06c50067d4d3f49e98dd8b76d474bf8bff3b55e4c561c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous embedded URLs pointing to compromised WordPress upload storage and other disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9908

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 https://sananselmo.com/wysiwygfiles/file/19713429264.pdf In PDF document text
- https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/pd2ei86hqv7tqvsd4fj9p4hv1t/6992661931.pdfIn PDF document text
- https://www.abrasco.org.br/ckfinder/userfiles/files/kugetite.pdfIn PDF document text
- http://usateatop.com/_upload/files/99279596183.pdfIn PDF document text
- https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/p6ocg5kafq49o5canlsj9cf6g9/xukapokakazav.pdfIn PDF document text
- https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/5c33a0dce9a2fcdf0bce851f73f07452/selimuw.pdfIn PDF document text
- http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fde9b6034---64079786451.pdfIn PDF document text
- https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/74cedc89c1ec674e652398448661e698/33431967216.pdfIn PDF document text
- http://nsdadventist.org/FCKData/file/62238410426.pdfIn PDF document text
- https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/4svtbgiimj14qlbc92jtlh1rp6/mizem.pdfIn PDF document text
- http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e530d0be8---dufogi.pdfIn PDF document text
- http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109e07ac6996---82998215145.pdfIn PDF document text
- https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/tfio572u7ce4kmdaaeao4ipr7j/20008008894.pdfIn PDF document text
- http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/5ff674f9bd2421825f74e450cbfe3fd1/17845027673.pdfIn PDF document text
- https://www.stock2morrow.com/ckfinder/userfiles/files/fazevugomegorivatijaz.pdfIn PDF document text
- https://accuratesearch.com/userfiles/file/55932313957.pdfIn PDF document text
- http://sharidyer.com/clients/863431/File/98462267171.pdfIn PDF document text
- http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16083244d153da---77227352954.pdfIn PDF document text
- http://twtipa.com/upfile/files/2021/06/29/96122516103.pdfIn PDF document text
- http://soflocops.org/clients/83264/File/gopafikil.pdfIn PDF document text
- https://minhgianggroup.vn/upload/files/99528448103.pdfIn PDF document text
- https://rlmahtani.com/userfiles/files/pebur.pdfIn PDF document text
- https://villadorottya.hu/uploads/frontend/files/torevize.pdfIn PDF document text
- https://visualarchive.bg/files/50355327664.pdfIn PDF document text
- https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/f84aec5019b05c8234e6e2f85b84cc91/45192900858.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/f3fa3c9def38cd88b5e2ebe8be3c1ec1/63934311874.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=name+the+following+covalent+compounds+as2o5PDF 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_off0000c440.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC440	11448 bytes
SHA-256: `17b1f1720a42c69e0ad4475f3cd2eaaac233d52a9785984ff712498c242a1754`
`font_01_sfnt_off0000df13.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF13	17696 bytes
SHA-256: `7c764eda51c0413aac3fce3d6eb3f5940713c58f223a01b7b6c38e69407c3647`
`font_02_sfnt_off00010cc6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CC6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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