PDF malware analysis — malicious · eb09e222aa3731b7

MALICIOUS

PDF

89.4 KB Created: 2021-07-10 02:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 32af3736924ee2e8145397dcdb26c6ad SHA-1: 4b336e649553a6379786244eda2c60f11420c676 SHA-256: eb09e222aa3731b7b8882af5c1616ac2f0b7214e265b1fa94663e4cd1013a3df

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated and appears to contain embedded URLs, further supporting the phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9924

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://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86f9e675ce---dorunesodu.pdf In PDF document text
- https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eb00f99a899a1c805b7797af853472ac/26340341359.pdfIn PDF document text
- https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/9cdde911d36fa165d0fd549aa38d85ac/8294823926.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/4nhm2d6nobhvr0qepran7ms397/luganivog.pdfIn PDF document text
- http://wellfoto.cz/pictures/files/8243401615.pdfIn PDF document text
- http://jingchengs.com/jingchengs/ckfinder/files/20210704154709.pdfIn PDF document text
- https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/a15e13da234792b6bc30b7ba3aa69dfd/64910797514.pdfIn PDF document text
- https://bednidhitraders.com/userfiles/file/xiwadudowufulivaxuzazi.pdfIn PDF document text
- http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078e7f2d02eb---61914813557.pdfIn PDF document text
- https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/c21e48c89dea9cdcd1f8e711248af222/sapes.pdfIn PDF document text
- http://111-orte.de/testarea/cwsCMSlight/media/files/sezeberaxiwuri.pdfIn PDF document text
- https://cleartunemonitors.com/ckfinder/userfiles/files/51840708320.pdfIn PDF document text
- http://fine-cottage.ru/userfiles/file/bovezesakejulutare.pdfIn PDF document text
- http://accronline.com/userfiles/file/napalozexesi.pdfIn PDF document text
- http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/55e4872a58e4a23d4bc63fae627d0386/22108902924.pdfIn PDF document text
- https://banghenails.com/upload/file/57434157348.pdfIn PDF document text
- http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071229552118---76192365805.pdfIn PDF document text
- http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7a6850a8e---lexetubuzisulu.pdfIn PDF document text
- http://provia-events.de/pics/fotos/1/file/xivufimepugojiposota.pdfIn PDF document text
- http://cameralehiep.com/hinhanh_fckeditor/file/67877469337.pdfIn PDF document text
- https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/23385879284d84b0e53e33aaba17c9f6/25249744619.pdfIn PDF document text
- https://mamadona.ru/ckfinder/userfiles/files/pitexowirorupajes.pdfIn PDF document text
- https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/bj6fhfvvj3oampfsr057p06sj3/posenu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=apoplexy+meaning+in+englishPDF link annotation
- http://irodori.kir.jp/files/file/dofogejapib.pdfIn PDF document text
- 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000da22.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA22	10700 bytes
SHA-256: `8356b21cd7f6e468332e77e5c7d2806d4b404084d244528c998ab1c665fe031e`
`font_01_sfnt_off0000f27a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF27A	17328 bytes
SHA-256: `81a6a9c040b789a49ca348ba1b9a8775169a66743911380b3c1384d835473153`
`font_02_sfnt_off00010c91.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C91	19456 bytes
SHA-256: `6e7084a429141e7898fd0c0d89dc63119668f5e3f0b9c46c76af6524e31fbbef`
`font_03_sfnt_off00013fbe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13FBE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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