PDF malware analysis — malicious · 173a8d50a05f4a2a

MALICIOUS

PDF

87.4 KB Created: 2021-09-04 01:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 2fcba0548ba2176f5d3b456866e447da SHA-1: 7940f1c605e2d9b45361ed24d411c42b0ffa7f99 SHA-256: 173a8d50a05f4a2ae888fd0c83b6a07b0b671b628acbe43abeb1b11e5615af6c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://acupunctuuryao.nl/ckfinder/userfiles/files/fujorebiwikupuna.pdf In PDF document text
- http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/wulinovikijoludonelotul.pdfIn PDF document text
- https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/c1fba66d93153e11371d44282075071b/40899475796.pdfIn PDF document text
- http://www.awakohchang.com/image/upload/File/6968442938.pdfIn PDF document text
- http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f51b5a1029a---42690980878.pdfIn PDF document text
- https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/rubstsg5fbo43elcuvprfudq3q/30610864874.pdfIn PDF document text
- https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/8ce69b9ec391b96f9a580da954f2a637/71628581817.pdfIn PDF document text
- https://fobh.net/userfiles/files/wavanojevuziwuwi.pdfIn PDF document text
- https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/e267954c1185fcfb8f272f14ed467905/zobigedupu.pdfIn PDF document text
- https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/0b01170244a05053cc3db310f0e788d2/63880700328.pdfIn PDF document text
- https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/b5751b9c91b17e9b527171500a26d497/24281476092.pdfIn PDF document text
- https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076600364ce1---nokifolapafe.pdfIn PDF document text
- http://wxbeimei.cn/upload/ckimg/files/202108280413075353.pdfIn PDF document text
- http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf9d920bb5---20187983046.pdfIn PDF document text
- http://greathorserider.com/ckfinder/userfiles/files/76252259269.pdfIn PDF document text
- https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/40da6341f5530d4e365cd4c7bbb79263/33063759842.pdfIn PDF document text
- http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cd40f583465---22209653317.pdfIn PDF document text
- https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/9619ac88055a7dc092468078d2b67bfb/29756706959.pdfIn PDF document text
- https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/ab078ce16bd88999784f94f6a029f4e6/matuxunozefokufadapoko.pdfIn PDF document text
- http://younewstoday.com/task/userimages/file/53644594161.pdfIn PDF document text
- http://darstin.com/userfiles/files/77570246541.pdfIn PDF document text
- http://gewald.ru/content/Files/55016972578.pdfIn PDF document text
- http://www.alexgis.com/siteuploads/editorimg/file/8482512676.pdfIn PDF document text
- https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/a3ngqdvem0bmth7rl0nmhjtnmt/47775698307.pdfIn PDF document text
- http://tbm-mova.by/images_from_html_editor/file/dipigilobisagulotoda.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=python+for+beginners+pdf+2019+free+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_off0000ea0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA0D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001021f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1021F	19176 bytes
SHA-256: `e07c189570f569017d8e7f6e6556a21ae8847e361778f6a39f40174d7a6e51ba`
`font_02_sfnt_off0001345c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1345C	11580 bytes
SHA-256: `9a38a6052d57026943116b7263850ad99deadc69fbe7c6ce51a9d48b0a0e9742`

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