PDF malware analysis — malicious · fe43af1003a69566

MALICIOUS

PDF

80.2 KB Created: 2021-10-05 12:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: a437cd8ed4e2d23cbc1ff1e65d248aac SHA-1: 2d6666a195e2e31414bf3291e595d1b4b50e63ab SHA-256: fe43af1003a69566268b1e577d66a989bab54d18baa77db30860dc2cc3d3e9e8

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document containing embedded JavaScript, which is a common technique for delivering malicious payloads. It also functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely to download further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing and trojan activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://kultmotor.virtualbodybuilding.hu/images/files/zaxosejewijuj.pdf In PDF document text
- http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/ruxavoperebipilazorivajex.pdfIn PDF document text
- https://twinscooking.nl/twins/userfiles/file/83062664592.pdfIn PDF document text
- https://diamond-marketing.cz/soubory/2417167401.pdfIn PDF document text
- http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/71161505279.pdfIn PDF document text
- http://www.oalysa.cz/ckfinder/userfiles/files/58720382977.pdfIn PDF document text
- http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/96512462911.pdfIn PDF document text
- https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/tvn1s2dp5jlu4ren65hp4rsqg6/32629059365.pdfIn PDF document text
- http://novena99.com/uploads/files/202110031500415021.pdfIn PDF document text
- https://www.pharmawell.eu/ckfinder/userfiles/files/96733169379.pdfIn PDF document text
- https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/32b027359fc89a34bddf9f57758bcca9/gezavonigiziregowaza.pdfIn PDF document text
- http://teenmag.cz/userfiles/file/49557873650.pdfIn PDF document text
- http://kamerton.nl/clientfiles/pigezilabawesiriralavoza.pdfIn PDF document text
- https://ipmgrouphr.com/uploads/news_file/29756604351.pdfIn PDF document text
- http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1615ab745ef7a4---26249443222.pdfIn PDF document text
- http://omatsuri.kr/data/userfiles/files/52182640472.pdfIn PDF document text
- https://bc2000.order-pro.com/ckfinder/userfiles/files/puxuxodugegatesixevop.pdfIn PDF document text
- http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161382d9af1852---79906440217.pdfIn PDF document text
- http://www.mananthavadynorbertines.org/www/js/ckfinder/userfiles/files/37368159400.pdfIn PDF document text
- http://edu-soft.ru/site/htmlimages/file/90787973658.pdfIn PDF document text
- http://wadsoda.com/UserFiles/File/bibepanivakerozedezegegaw.pdfIn PDF document text
- https://toolsatool.com/userfiles/files/73826985534.pdfIn PDF document text
- https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/3870f8a515601c256cb16c47d8ffd9ee/lasunojibu.pdfIn PDF document text
- https://inprovitcentroamerica.com/ckfinder/userfiles/files/98574405462.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=the+sound+of+waves+pdf+downloadPDF 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_off0000d1a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1A4	10520 bytes
SHA-256: `a2b376948bbb7f32c4bde109be13a358253e99a5b62e3bc60b78ffe6de9ba1b3`
`font_01_sfnt_off0000e99f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE99F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000101b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101B1	18916 bytes
SHA-256: `c0cbcb35fa4835332a5fd93094210c770072caef54ab3f96acd0eecad813dd45`

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