PDF malware analysis — malicious · ee1c9fede6cc9b82

MALICIOUS

PDF

80.2 KB Created: 2021-09-02 20:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: e155ed1a299248196adf5e4765c2a75a SHA-1: f8059c45c42d51f7e6f8f50b22f56b652c3b8f97 SHA-256: ee1c9fede6cc9b8225c2cb96da7e71872e83f378e5c71a2f6e468c5d55b94924

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 Pdf.Phishing.Trojan. The file contains a link farm pointing to compromised WordPress sites, suggesting an attempt to lure users to malicious content. While no scripts were explicitly extracted, the nature of the link farm and the detection name imply a phishing or trojan distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://kmbb.at/userfiles/file/48800411321.pdf In PDF document text
- http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16094552197722---57512133209.pdfIn PDF document text
- https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b8014ec933d---gozazinodujodopeniziba.pdfIn PDF document text
- http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d0586d8f2---mewodimugemimatizegodo.pdfIn PDF document text
- https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/p7q4bvmtbr73b7b31vkt7kqed7/logojadopilovoked.pdfIn PDF document text
- http://bolshunoff.ru/images/wysiwyg/file/45017593493.pdfIn PDF document text
- http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a4decb18812---34199438687.pdfIn PDF document text
- https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/cb4d538ca232e2fcc4bb66b0a6e05c03/dibelabivelulezegikixa.pdfIn PDF document text
- http://phunggia.biz/userfiles/file/79589928749.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf5a538452---fasilibamunirojumananokov.pdfIn PDF document text
- http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/0b264e95857cf3a3b3ad6e6044dedcc4/33748928446.pdfIn PDF document text
- http://langmypham.com/luutru/files/68374549451.pdfIn PDF document text
- https://francoisdaulte.com/ckfinder/userfiles/files/6456627937.pdfIn PDF document text
- https://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/2744068613.pdfIn PDF document text
- http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe4d515f5e---23789947687.pdfIn PDF document text
- https://akita-inu.lv/www/files/files/94304003598.pdfIn PDF document text
- http://moscowfashion.net/content/xuploadimages/file/5217186336.pdfIn PDF document text
- https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a89a2345f4d---44487033311.pdfIn PDF document text
- http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fea80c181---13189140679.pdfIn PDF document text
- https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/gp6crhe5rkrq9horcmodkt3nu4/21694595101.pdfIn PDF document text
- http://samnakthodrahassob.com/userfiles/file/23952725556.pdfIn PDF document text
- http://status-go.net/gfx/userfiles/files/turubebojakujidexave.pdfIn PDF document text
- https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/20ead6997d9c9a899b220cc3b827b8df/fivaresuxatojipizumujigo.pdfIn PDF document text
- http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b96068a96ae---90069253913.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/aa63aa2eaec041b9545e444196604da4/komawovusubi.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=bimanual+pelvic+examination+indicationsPDF 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_off0000d75b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD75B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ef72.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF72	10896 bytes
SHA-256: `e21710bfe3738dab2d1a09413e8e60870e80f4122cf16237b2db0156fa55f198`
`font_02_sfnt_off000108ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108AD	16604 bytes
SHA-256: `ebd4c1aaabab4451d5769f2ead76a35665b245c7984c7ab79b88bfc6920aeb9e`

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