PDF malware analysis — malicious · 027204aa53a1909b

MALICIOUS

PDF

87.3 KB Created: 2021-06-28 07:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 36ea220ba71d142d8b5532f58b83fe0d SHA-1: b217ec3f0a6b42549e1feac87b853a4530ad2764 SHA-256: 027204aa53a1909b4b7f651db1bf6cddf0b4be010522b44ee47098c6d7fe76e7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV, which identified it as Pdf.Phishing.Trojan. The document functions as a link farm, directing users to numerous external websites hosted on compromised CMS uploads and disposable domains. The presence of embedded URLs and the nature of the heuristics suggest an intent to redirect users to phishing sites or download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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=how+to+thaw+frozen+scallops+quickly PDF link annotation
- https://samsungvrvklima.com/upload/ckfinder/files/7777790155.pdfIn PDF document text
- https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/9bc2a864efcb64b6a3093305207b3465/59560226327.pdfIn PDF document text
- http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/vhetg0kkdtm6ltqvhmcg3c5knn/vofisakapotuk.pdfIn PDF document text
- http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/60808586699.pdfIn PDF document text
- https://alice-immo.com/userfiles/file/wiwevijelusenapemufozifos.pdfIn PDF document text
- https://envida-nieuws.nl/bsb_website/upload_fck/file/98107095533.pdfIn PDF document text
- http://turagent007.ru/userfiles/file/jumadukokivetivepexi.pdfIn PDF document text
- https://kitapkapla.com/upload/ckfinder/files/vijutitusumurebozufe.pdfIn PDF document text
- http://hayatteknoloji.com/webimage/file/31630124801.pdfIn PDF document text
- http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b877942f71---15391134318.pdfIn PDF document text
- https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/b461ae25a0949d66e11d4bcf5e5bcd0d/24388476535.pdfIn PDF document text
- https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac9390af59---kejok.pdfIn PDF document text
- https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/822c8acae85684f64f6990a9ad8a455d/wanemabon.pdfIn PDF document text
- https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/or2sp1rqsqm2lh7jbqhsgs3usp/fuxusugudinej.pdfIn PDF document text
- http://sosnovgeo.ru/userfiles/file/66060976484.pdfIn PDF document text
- http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a9456998483---30230907687.pdfIn PDF document text
- http://tsg-edinstvo.ru/userfiles/file/mepegupipozenafa.pdfIn PDF document text
- http://sosnovgeo.ru/userfiles/file/7262864801.pdfIn PDF document text
- https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160caf0f369904---42309974067.pdfIn PDF document text
- http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a33fe679310---44140006600.pdfIn PDF document text
- http://stensoproject.com/userfiles/files/xigur.pdfIn PDF document text
- http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160848c8a74d95---vabafu.pdfIn PDF document text
- https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770e5b45d06---ritijogojo.pdfIn PDF document text
- http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b64cb8ac022---pokikodana.pdfIn PDF document text
- https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/e96488e09b411f6c6dc177e28d8ec700/45185302161.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_off0000f12d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF12D	17464 bytes
SHA-256: `427426debe4fcc9fa7e4a18870a2a6895aacdf3eae718860108b51aa092ed922`
`font_01_sfnt_off00011d72.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D72	11168 bytes
SHA-256: `08e38634c32eda2a9b98b61dff9ab00986793cc70b4da345b17bbc18f892bc29`
`font_02_sfnt_off00013794.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13794	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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