PDF malware analysis — malicious · 36f2648e1d182a15

MALICIOUS

PDF

96.5 KB Created: 2021-06-30 10:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: dc49e01c53e92006419e7e483c9de67e SHA-1: dad2c3e334b1fd20126e230f8f80fbc6c1edf4e7 SHA-256: 36f2648e1d182a159f471292f6253af349affbd856810c81d5fe2c0c1b9b089c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits vulnerabilities or serves as a phishing lure. The presence of numerous links pointing to compromised WordPress uploads and disposable hosting suggests a link farm designed to redirect users to malicious content. No scripts were extracted from this sample, but the overall structure and URL patterns are indicative of a phishing or exploit delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 0.9825

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://casaperferiesantamariagoretti.com/writable/public/userfiles/file/rikinutasusaravinim.pdf In PDF document text
- http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1f6380f8c---kofozefefud.pdfIn PDF document text
- http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4f43e1054---31306166542.pdfIn PDF document text
- http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/4346589588.pdfIn PDF document text
- https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/eo8m6ql3u0ba4hamgfvrkjjudj/29260002398.pdfIn PDF document text
- https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/71dc7750844fc4f1573565f259d40bac/moxomewoto.pdfIn PDF document text
- http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70bca0ad28---69146181216.pdfIn PDF document text
- http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098886c2408f---55339161101.pdfIn PDF document text
- http://cinstech-inspect-survey.com/fckeditor_userfiles/file/pinukonuwubikazumaxo.pdfIn PDF document text
- https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/evej6o45vrgrd1borr66otei9k/50722731362.pdfIn PDF document text
- http://albatrossmrn.com/konadnew/userfiles/file/metozuxinomixuxala.pdfIn PDF document text
- http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/5588925823c05d5a887b771b8ee51d05/19027921786.pdfIn PDF document text
- https://beautyreviveshop.com/newerac2c/userfiles/file/44709752649.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb3365bd9d---xovuvogavu.pdfIn PDF document text
- https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e1bb82b97---34317605277.pdfIn PDF document text
- https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/fe0q9icvjfi643e8h40duhq9ar/safabozalululikutepe.pdfIn PDF document text
- https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/9e77ab7a581a037be9b68e1e0c95b609/72939307788.pdfIn PDF document text
- http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a418ff343eb---razifop.pdfIn PDF document text
- https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/db2f88cc3935eb49a0c0f050ef017527/14472590038.pdfIn PDF document text
- http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085918da5f0a---roginalodaset.pdfIn PDF document text
- https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1ddd22bcf---19670983331.pdfIn PDF document text
- https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16080b6766868a---kotixotitis.pdfIn PDF document text
- https://angkortaxiservice.com/userfiles/file/gamemolobewadi.pdfIn PDF document text
- https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/26b48a96e500548170c9aa8331942c78/vujulupexovexutadewi.pdfIn PDF document text
- http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16088694db2172---97423578012.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=scones+made+with+sour+milkPDF 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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f07e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF07E	1824 bytes
SHA-256: `065c7a4f11f9e75f6e8b37807bc82b370f7b2846456f0b3b832c619392bb01b8`
`font_01_sfnt_off0000f910.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF910	10988 bytes
SHA-256: `bd519fd8083f345061194ba6f5bc0112f06f3bb769023b880d3982b1f59c8983`
`font_02_sfnt_off00011268.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11268	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00012a79.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A79	16684 bytes
SHA-256: `5786d7639d2cc1522a1a3889fae5b5c9fbcbd5f5c9de2f5a2930a0e54327038d`
`font_04_sfnt_off00014212.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14212	18912 bytes
SHA-256: `fe858891059d648e3a0cb15fdcb21373227662441c481b711622d67f055b21a8`

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