PDF malware analysis — malicious · 14ae9a7718367b0d

MALICIOUS

PDF

90.1 KB Created: 2021-06-25 23:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: ef5950dcda75d323019ff5d754085dcc SHA-1: 279ff23243cf4248ca963a64f609a34aca651934 SHA-256: 14ae9a7718367b0d6a277da778126d2b0e3416eb7fa0afb801dcea8f5b536649

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains numerous links to external resources, many of which point to compromised WordPress sites hosting PDF files, suggesting a phishing or malware distribution attempt. The presence of invoice-related language further supports a lure-based attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbd13ddb53---64693811110.pdf In PDF document text
- http://strategie-online.net/catalogue_dynamique/file/80903577892.pdfIn PDF document text
- http://grandchainfamilyfoundation.org/clients/85333/File/nusikotozuvosedulidegodo.pdfIn PDF document text
- http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d490022d7---35245088743.pdfIn PDF document text
- https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077205222af6---34322556196.pdfIn PDF document text
- http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ca48565ec---33001937844.pdfIn PDF document text
- https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/487abed82bca37904ebedcdad5645137/2264044579.pdfIn PDF document text
- https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8e6a1d03f---bumobono.pdfIn PDF document text
- https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a32e2077af1---8740757052.pdfIn PDF document text
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/b5j1bag5qd2nev791sjorcse02/buzofa.pdfIn PDF document text
- http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a7d34994c---xumoxixalatasuponikame.pdfIn PDF document text
- http://bahtiyardishekimi.com/fckfiles/file/kanubu.pdfIn PDF document text
- http://polyacer-ecp.com/userfiles/files/20210620_164944.pdfIn PDF document text
- https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160af7ba563024---94849243217.pdfIn PDF document text
- http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c139a7411---xozomotexolukavi.pdfIn PDF document text
- https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/bda70eda1f4a884899253fbd51a5ceb8/41529715851.pdfIn PDF document text
- https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/fir8j6u11d3tftr6sfiopcfc9n/xemaburevumug.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a066598b5de---7652278909.pdfIn PDF document text
- http://cnkls.com/userfiles/file/1624543850.pdfIn PDF document text
- https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/2ae1f4d7b4801c46b2f3c658919b4a3f/boxiwofisifimusu.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/89ceb1bd7774b3d225d90873cd049682/detizaro.pdfIn PDF document text
- https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/2259dc70046a6fe91f085b9dd8fadc44/66120242492.pdfIn PDF document text
- https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/3cedd8d1995e90a8b0e090beecb9d44c/61661718948.pdfIn PDF document text
- https://ever-progress.com/upload/files/jedelevagagamipafut.pdfIn PDF document text
- http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160794b45ee7d0---jakaguk.pdfIn PDF document text
- https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/ae11048e3bd4f98218d9eb69bfaab80f/gelodamexe.pdfIn PDF document text
- https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d50ca620aa---18754972364.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=abandonment+costs+oil+and+gasPDF 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_off0000faa9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAA9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000112c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112C0	10736 bytes
SHA-256: `8572ea490833e4f668a749af19cb9da8da29ef8adbd78c0dd3e32f2e6eb3403f`
`font_02_sfnt_off00012b34.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B34	18108 bytes
SHA-256: `4f2a2aa3e4331c215a132ac118347888320bceda5d52632115649a63165768e3`

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