PDF malware analysis — malicious · 4bb596ae460247ef

MALICIOUS

PDF

87.1 KB Created: 2021-07-14 02:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: c952ee1042712359d7c9e7293767e3de SHA-1: e2def3ef16225fa000278f639feb18d161375026 SHA-256: 4bb596ae460247ef3b02e487b633b487927fbf4467766f55a2bd1e1e0d77384d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised CMS upload storage, suggesting it functions as a link farm. The presence of 'utm_term_redirector=True' and the structure of the links imply an attempt to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c464d4c22---xofezebexizelesele.pdf In PDF document text
- https://bajrahrs.com/userfiles/file/47411590682.pdfIn PDF document text
- https://latework.cz/soubory/sevobukefabezu.pdfIn PDF document text
- https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/4ee3c46cffbec17c4376b5e23dc7d669/46227871592.pdfIn PDF document text
- https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/b331a166a390f313594d473b9386637c/24167838094.pdfIn PDF document text
- https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ece6f14bcf---pujadorusago.pdfIn PDF document text
- http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a386d6c29f---murivivetolozanewob.pdfIn PDF document text
- http://dh-cell.com/ckfinder/userfiles/files/garekigokujuveli.pdfIn PDF document text
- http://ssaisarang.com/ckfinder/userfiles/files/56576091268.pdfIn PDF document text
- http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093e804c0e9a---bogukaxabenevapup.pdfIn PDF document text
- http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ab730480ea3---4785724386.pdfIn PDF document text
- http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/6f267d29b83ef7621443aeac7589a9bf/6714987088.pdfIn PDF document text
- http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16076db2f7cd34---zabadibanirutowat.pdfIn PDF document text
- http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160714e2f5656a---lubuwemewolosibezi.pdfIn PDF document text
- https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/bccea7518ddfffade565aeddba709fac/76766342817.pdfIn PDF document text
- http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba751e2523a---23096573170.pdfIn PDF document text
- https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c633bc1fafb---vusegumujugipajezisob.pdfIn PDF document text
- http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609833a1326b2---tomitubafirivigezonovoje.pdfIn PDF document text
- http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce35934c53---xolubipoduf.pdfIn PDF document text
- http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b77f216b947---7459254761.pdfIn PDF document text
- https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/c8c0efd068d061244b81f09aea3198f6/kelubodusototigo.pdfIn PDF document text
- https://a2designbg.com/userfiles/file/61053350095.pdfIn PDF document text
- http://ultraljud.nu/bild/files/99883353965.pdfIn PDF document text
- https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ca3134a6f23---murugevifeberuvo.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=easy+landscape+sketches+for+beginnersPDF 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_off0000f086.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF086	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001089d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1089D	11228 bytes
SHA-256: `2f9837f76e453070f9967d4692b3ed8a5182c38c2277fe997f5cbfa4c94709d6`
`font_02_sfnt_off0001226e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1226E	17088 bytes
SHA-256: `29abd7b9f2961a986b3ac48eab9349363c2eeaa395d5d8ee28fa5f5c6f14137e`

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