PDF malware analysis — malicious · 4f1f106e87195102

MALICIOUS

PDF

89.0 KB Created: 2021-08-14 07:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 9f7a041cd70388973ae9ad0114cfa871 SHA-1: 828d68bf1af0bb38e878a7b2a5f191fb5930cc6c SHA-256: 4f1f106e87195102da1f058d0b3e5ed9e8fb6bcc3ae1b250db8e42f9ca217873

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

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 a link farm pointing to numerous external URLs, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and the nature of the URLs indicate a likely phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://computer-rudolstadt.de/upload/file/dinerutomuv.pdf In PDF document text
- https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/vfobk9h2l0lp3761s0169pnq6e/31337159443.pdfIn PDF document text
- http://csc-0898.com/userfiles/file/20210611173326_4czcnm.pdfIn PDF document text
- http://dyweisheng.com/uploadfile/file/2021081408561473499.pdfIn PDF document text
- http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160819f90883ec---bonujadoxutesogelivixop.pdfIn PDF document text
- http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/3544t1ij0jr0sfl1kitfhsma37/51954723322.pdfIn PDF document text
- http://primaneighbors.com/userimages/85942867255.pdfIn PDF document text
- http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e0899cd64f2---modegirofigoluzupaboruxil.pdfIn PDF document text
- http://kpotplace.com/uploads/files/juxefugawiwubumi.pdfIn PDF document text
- http://mea-travel.pl/userfiles/file/suditotaxow.pdfIn PDF document text
- http://firmen-bekleidung.at/userfiles/file/53233649108.pdfIn PDF document text
- https://unique.global/wp-content/plugins/super-forms/uploads/php/files/891153277284a36b767f980242f906de/fagogupukamenizofe.pdfIn PDF document text
- http://mwflower.com/upimagesfile///16284549832.pdfIn PDF document text
- http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ac12b8ba9---82455259256.pdfIn PDF document text
- https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/2d3b40fdc99ff9b1027475b9627f07b5/dogimizit.pdfIn PDF document text
- https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/ea93d216488252df5d9397039353140c/jinuzosagovi.pdfIn PDF document text
- https://lolakarimova.uz/ckfinder/userfiles/files/vajotufetuzavojoz.pdfIn PDF document text
- https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/7553f87b2b376e9ff9e05e942d8c9e66/97175343425.pdfIn PDF document text
- http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16098617e9da21---93554102744.pdfIn PDF document text
- https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a778a23810a---55469057536.pdfIn PDF document text
- http://galluccifaibano.it/userfiles/file/4677353922.pdfIn PDF document text
- http://nuestratierrapremios.com/campannas/file/95135987167.pdfIn PDF document text
- http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074f8cb8df16---vemidasuxowadavura.pdfIn PDF document text
- https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/84a1aa4da8e7c91b225b8d4ba37eb38f/24227323395.pdfIn PDF document text
- https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcff35d74a3---nolafadefegejatavolufa.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=love+in+the+time+of+cholera+movie+watch+online+freePDF 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_off0000f67e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF67E	10540 bytes
SHA-256: `e5293c031c13ff1c00d08167594d9941000fac08eb788a1cb92924bf6ecfdb18`
`font_01_sfnt_off00010e4d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E4D	17568 bytes
SHA-256: `f600895521dfec69e8abc4016262697970e30b67972299c19c3b4a15e31ef0ca`
`font_02_sfnt_off00013c34.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13C34	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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