PDF malware analysis — malicious · 589d55e31532aabc

MALICIOUS

PDF

83.7 KB Created: 2021-07-14 03:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: b206577074788fe753c35b8f2078cdc2 SHA-1: c0b127bdbf8f9ffc0fb4008e446af4cd842c9f03 SHA-256: 589d55e31532aabc0183be6521c0d02a985307f328c63b15709d8444fa17ab47

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a malicious PDF detected by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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 https://irlanc.ru/uplcv?utm_term=reasonably+well+meaning PDF link annotation
- https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/26a4c912d5b259035f459a190a077400/25480822041.pdfIn PDF document text
- https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/knisgq7dout444mg0s493sat85/misegawited.pdfIn PDF document text
- http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/30174166404.pdfIn PDF document text
- http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a2eade52d---jawidokobijisimifelefigo.pdfIn PDF document text
- https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098373826a70---9217551620.pdfIn PDF document text
- http://cartonwrappingmachine.com/userfiles/file/vuwuraketodexidubaka.pdfIn PDF document text
- https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c897851f96---38284907527.pdfIn PDF document text
- https://soudurelausiere.ca/upload/editor/file/bosadadefusovuzuje.pdfIn PDF document text
- https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/f62b3a5deb69f5933945c469387f9325/lisowexorixatijujapu.pdfIn PDF document text
- http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16077fdc4b9518---43299901844.pdfIn PDF document text
- https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/8k1425bcacbgs9vf5co52ctr35/ranuxixogir.pdfIn PDF document text
- http://ifa-astrologie.de/userfiles/file/82614036979.pdfIn PDF document text
- https://webmenuplus.com/images/file/46783704831.pdfIn PDF document text
- https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/df25b960d0c1b74abfdc68f07d0f6c8d/16637878817.pdfIn PDF document text
- https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/6d76a6349053581e54a367f55e1d9fcd/51627970513.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc89e85965---tenaferozig.pdfIn PDF document text
- http://lakshimi-kaatsu.com/user_data/packages/default/imgfiles/wazibefuxajotopu.pdfIn PDF document text
- http://school19-zav.ru/userfiles/file/vekaligoditejap.pdfIn PDF document text
- https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/5f8927885e1d1e179e4e50aac9b498ef/ruxubelunexa.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160737189588fa---295000581.pdfIn PDF document text
- http://elcampoeco.org/FCKeditor/file/5781007802.pdfIn PDF document text
- http://mousike.it/img_ins/files/61862114645.pdfIn PDF document text
- https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/a8f3b78591ba77f707441cb2b66a489d/xinalefomakelajul.pdfIn PDF document text
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d103bc13a9---49321117185.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e49b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE49B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fcb2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCB2	10636 bytes
SHA-256: `71622de9cd6d83e886bfa583c448782df95f7f3a48853a88ee5cc5f385cda9db`
`font_02_sfnt_off0001150f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1150F	16712 bytes
SHA-256: `5b184d3ebb9a4efc172f7e3832cccc43ff0d348f841dca681f2a588a855ed770`

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