PDF malware analysis — malicious · cf3673308d91193e

MALICIOUS

PDF

91.1 KB Created: 2021-08-11 10:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: e453e564a0274439b19171c6d0384937 SHA-1: 4e1e5890d672316f3ecddd1462c612b0e3833f3e SHA-256: cf3673308d91193e611163bf3c6343b01da6f3c28a55b7cfee11db4512ff2bc1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

Nyx PDF Classifier malicious score 0.9906

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://ridgefieldpark1967.com/clients/3/39/39eebdc8797e30ee23d4fd57d071fd44/File/60252805222.pdf In PDF document text
- http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/69le7pnkiincfsotp0cqkq86k6/68560743510.pdfIn PDF document text
- http://gtshotel.it/images/file/73974229644.pdfIn PDF document text
- https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d6b96908c---14312886490.pdfIn PDF document text
- http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608a49bb4c1c7---nixisin.pdfIn PDF document text
- http://tramtronbetong.com/uploads/userfiles/file/87603484317.pdfIn PDF document text
- http://cokhitienvuong.com/uploads/files/pejuludadipabotagep.pdfIn PDF document text
- https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8e4f24b1f---48787588053.pdfIn PDF document text
- https://durgabas.coop.np/ckfinder/userfiles/files/gedavaxaze.pdfIn PDF document text
- https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e706b2de7b---zejopuva.pdfIn PDF document text
- https://kurtoglumob.com/upload/file/gufowikelobejikaxuxafi.pdfIn PDF document text
- http://aristosaigonhotel.com/uploads/files/67889306437.pdfIn PDF document text
- https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/2938efb3d666c687b210d69b3e40b2f1/98593746775.pdfIn PDF document text
- http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8c241f098---16190983773.pdfIn PDF document text
- http://vladjurnalist.ru/archive/file/rojumumiruxapinuferojuk.pdfIn PDF document text
- https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/203bf899cab1a0d3b2cf7d3a181345f9/81623287163.pdfIn PDF document text
- https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fdac30e8c---90750738032.pdfIn PDF document text
- http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7341165d25---jimorupugul.pdfIn PDF document text
- https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/gjvu4t095rio8tege3r4dhrp0p/dixivetowotujudabukixemen.pdfIn PDF document text
- https://keralatemples.info/ckfinder/userfiles/files/limotadesep.pdfIn PDF document text
- https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/c86c0bfbd75e38a1b3ffa9e5f5410d92/bedipigurevi.pdfIn PDF document text
- http://d4scanada.com/clients/8/81/81a8d3ecf29e0a7d9042e8364394d873/File/84437918613.pdfIn PDF document text
- http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eff9e29a67---62434755190.pdfIn PDF document text
- https://alakharia.com/public_html/userfiles/file/fisunufox.pdfIn PDF document text
- https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/1d4e9f73808534fcb8732d714a565176/tibipoxeposonas.pdfIn PDF document text
- http://acunambalaj.com/adenoto/upload/files/71211786787.pdfIn PDF document text
- https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/6b8ff18a7bbb4d3eb142777587a72ed8/8853542103.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=what+is+my+dad%27s+cousin%27s+baby+to+mePDF 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_off0000fbcf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBCF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000113e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x113E1	19424 bytes
SHA-256: `293e6a9f113b98e374415bf6e8322f201ee0a0b11d82477f1a11287212f6b6eb`
`font_02_sfnt_off0001455c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1455C	10872 bytes
SHA-256: `ba08a54681f101265fac8e0dd2ece724156c42eb7c17eb70b6069c5497f9b23a`

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