PDF malware analysis — malicious · f6850c2b06f8810d

MALICIOUS

PDF

90.6 KB Created: 2021-06-28 08:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 6ec44ccd72cbbcd3ed776aa2bc275da9 SHA-1: 99293014853dd46a3340d317718d81c4f4cbf254 SHA-256: f6850c2b06f8810d2e1f6bb5ec6032c3662956f7c0b5f6246bf8bc321c2a2397

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting it's designed to lead users to malicious content or phishing sites. ClamAV detected this file as Pdf.Phishing.Trojan, and the ML classifier also flagged it as malicious. The document's structure and link distribution strongly indicate a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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://analogsys.com/uploaded/file/120237159460d941bbb98e4.pdf In PDF document text
- http://accessiblevehicleservices.com/userfiles/file/16877837473.pdfIn PDF document text
- http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1f2659ba9---30886781358.pdfIn PDF document text
- http://sosnovgeo.ru/userfiles/file/rapododokinuf.pdfIn PDF document text
- http://cuboni.com/uploadfile/hong202106210550382639.pdfIn PDF document text
- http://chelseacarpet.com/ckfinder/userfiles/uploads/91879270175.pdfIn PDF document text
- https://amblamy.ee/upload/file/59979058875.pdfIn PDF document text
- https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/b4fb1b2680cf185e3fe76e36b2465f08/63876595768.pdfIn PDF document text
- http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e0f3b598e---xeriwusiteforawip.pdfIn PDF document text
- http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bebfb671c30---lapimovapatiw.pdfIn PDF document text
- http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f00ed9bd05---dobitajagivapekoziwugu.pdfIn PDF document text
- http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090f8a7b453a---46719623414.pdfIn PDF document text
- https://contact-house.com/fckeditor/upload/file/60737483456.pdfIn PDF document text
- https://aimara-bg.com/userfiles/file/mewenovojuj.pdfIn PDF document text
- http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/eddfa0bf6c02be78b27abc8a5c35c7f9/wawivubulakemupevi.pdfIn PDF document text
- https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/b3d99d8bbf78296943c15617394d57aa/34521000363.pdfIn PDF document text
- https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160759b16c836f---40681000963.pdfIn PDF document text
- https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608091dcb1b5e---pozazibidinazikiwi.pdfIn PDF document text
- http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/nle5fabp98hg94s2d9h5ls51pa/delulag.pdfIn PDF document text
- https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/da3af536ba2b940c0f5754477cf447a5/76169550526.pdfIn PDF document text
- https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/i1kgnlc9vv0h1qa5u5ibj3cl83/sovikuruzasavunovadotaxif.pdfIn PDF document text
- http://surmounttravel.com/userfiles/files/83316988168.pdfIn PDF document text
- https://ptogel2.com/contents//files/vilozikasive.pdfIn PDF document text
- https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d8bcd4917---falojonolilo.pdfIn PDF document text
- http://gps-tw.com/CKEdit/upload/files/88421214624.pdfIn PDF document text
- https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/9d71005782d2f76269cfe9dfc7e176b9/32475735616.pdfIn PDF document text
- http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081139b154c2---59712985699.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=momma+g%27s+soul+food+and+jamaican+restaurantPDF 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_off0000fbde.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBDE	11076 bytes
SHA-256: `575ac23db478e8df64af7cb3135e2074050f91cada8268e3e1fa4bad488dbf75`
`font_01_sfnt_off00011583.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11583	17964 bytes
SHA-256: `be2578e841a2eaf8ad4d5bcb7fb947fe780f3265ab584e2f974378ee5e16c585`
`font_02_sfnt_off0001446a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1446A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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