PDF malware analysis — malicious · 150395c7f9956c2e

MALICIOUS

PDF

83.1 KB Created: 2021-06-30 22:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: a7d98a001abc33bf9b36022d6decb3ce SHA-1: 768c98a60bcb3fbb6b6c34fef0b48d56d8830ce4 SHA-256: 150395c7f9956c2e6117cda4e8e7aeed19c3e2d65ca12eb8b7b87bbc89aa4827

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm or redirector. The primary purpose appears to be directing users to external, potentially 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://nomylo.ru/uplcv?utm_term=posterior+pituitary+function PDF link annotation
- http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a96f5460f05---sogododavubogok.pdfIn PDF document text
- https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/3fa1d99d8525c432e8f72d660835f686/mirajakomirusumojob.pdfIn PDF document text
- https://petikdaun.com/contents//files/11658354514.pdfIn PDF document text
- https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/52e0d21085bece59bac514e37348a5f1/88550345692.pdfIn PDF document text
- https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/76d2970228ab41827fe502be175aead9/4927585274.pdfIn PDF document text
- https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/44f2c2d5949d377d9e9041b83968f074/41999944940.pdfIn PDF document text
- https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/0a2d6794ab4cb79326259c7ce9c77cd8/mimevewapipiwap.pdfIn PDF document text
- https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cd9e799e7e0---75241295738.pdfIn PDF document text
- http://aisef.org/uploads/userfiles/file/file/lavojerenidazeted.pdfIn PDF document text
- https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c86ab992a34---82783449234.pdfIn PDF document text
- http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/jseh20f379kl1c2gb4gk510kje/59792293062.pdfIn PDF document text
- https://pet-fashion.ro/mm/file/7442085473.pdfIn PDF document text
- http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071ac4e99979---sijubibozaxofumejo.pdfIn PDF document text
- https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/a40e7ldp5e5q8t81tpb1fanvoj/kafizejamixefijuza.pdfIn PDF document text
- https://leavereview.com/customerinterview/ckfinder/userfiles/files/9902932974.pdfIn PDF document text
- https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/c1bcef6046c9ee47ad1228c916176a59/puwefibitanuxapexexenilo.pdfIn PDF document text
- https://alperbehang.nl/userfiles/file/8495135091.pdfIn PDF document text
- https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/850603243a6020bb0f18b029ae8e8f46/95280315840.pdfIn PDF document text
- http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c7297eb55---80510019618.pdfIn PDF document text
- http://reicar.dk/userfiles/file/17472895014.pdfIn PDF document text
- http://usarsenal.it/userfiles/files/sapubiluwa.pdfIn PDF document text
- https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/17bc490799a4047a8de6132d18455dc0/xapezezinivusavigemiropo.pdfIn PDF document text
- https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071de8cb1ed7---fulimojuxuzepenemavoweke.pdfIn PDF document text
- http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4f1543185---kijebogejoloxifituranu.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_off0000e65d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE65D	16056 bytes
SHA-256: `78b281bdaa2316d6cb871c7dbb03d12128b432554368d567201af879d33af1c7`
`font_01_sfnt_off00010f89.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F89	10644 bytes
SHA-256: `2c9df93a4f464e6d1d20414ae15d4aa73765034d0ade5f5ede80cd1740a4e36a`
`font_02_sfnt_off00012825.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12825	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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