PDF malware analysis — malicious · 9944c0167a318e44

MALICIOUS

PDF

80.9 KB Created: 2021-09-01 11:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 9fb7a80443ba592274ad0cad1ebbf357 SHA-1: 7679299903bfea92abe7e7b6653a015380018824 SHA-256: 9944c0167a318e44dd3eee655231bf10f08c74f6965a694ef658e08670145708

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or are structured as link farms on disposable hosting. The primary function appears to be redirecting users to potentially malicious websites, likely for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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://hanasushimenifee.com/uploads/files/demaxumafof.pdf In PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160921a38b6165---lazesotusupivinibube.pdfIn PDF document text
- http://mp-hd.de/data/aktualnosci_imgs/file/viravanuzogiliwiridet.pdfIn PDF document text
- http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607209c5f3efc---43208670407.pdfIn PDF document text
- http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d62de94ffc7---50735877597.pdfIn PDF document text
- https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/7288bcebbed144f85b75a02a299c9f8f/tixot.pdfIn PDF document text
- http://adveotec.com/img/file/kawumew.pdfIn PDF document text
- http://kvbm.org/pds/userfiles/files/zuxigelevezowovujege.pdfIn PDF document text
- https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbaf3053ca---gibiguzibekutad.pdfIn PDF document text
- http://zap-interactive.com/uploads/files/pipulovagokovek.pdfIn PDF document text
- http://nail-free.com/ckfinder/userfiles/files/waximosugexoladupesaka.pdfIn PDF document text
- https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/12d386c6e831c5e156473f16bbfaa236/22786041681.pdfIn PDF document text
- https://nocenzura.space/web/img/podborky/files/67677467080.pdfIn PDF document text
- http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ebbd5abd3---sapepagozex.pdfIn PDF document text
- https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb7ad7bcf6---mudaxukoz.pdfIn PDF document text
- https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/r3pbehq1ri9dmttpt32ibk3qt4/roxemizedugilorisuvowem.pdfIn PDF document text
- https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b27fa18bf7---13744002069.pdfIn PDF document text
- http://www.tiande-global.com/ckfinder/userfiles/files/6236256710.pdfIn PDF document text
- http://clubselectionvoyages.net/images/file/34379178041.pdfIn PDF document text
- http://baraanduliaptti.org/userfiles/file/bojesavokidapusutuvojuga.pdfIn PDF document text
- https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160cd884d8ac78---93311148193.pdfIn PDF document text
- https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/00uuptppq4o97hioidm6j2v1br/35764224934.pdfIn PDF document text
- http://cerescommoditiesltd.com/Images_upload/files/karupekuxepujisaremexor.pdfIn PDF document text
- http://nhasachconggiao.com/luutru/files/99049334442.pdfIn PDF document text
- http://mhinflatable.com/upload/file/85673937372.pdfIn PDF document text
- http://mytmbc.org/fckimage/file/5893887550.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=normal+ldl+level+for+adultsPDF 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_off0000dafc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDAFC	16892 bytes
SHA-256: `8d78fd76be417af4521531d77867e616685c4e4c24d283129a25fbc934b05209`
`font_01_sfnt_off0001065a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1065A	10460 bytes
SHA-256: `8d9af99c13bf288ae695ef47e001c4755eed2bbdf4c651198835c87299a4cbba`
`font_02_sfnt_off00011e36.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E36	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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