PDF malware analysis — malicious · d3addc82e8c0afc5

MALICIOUS

PDF

78.2 KB Created: 2021-08-19 10:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: ea95e747f4cc9d2a5013cd053783d2b3 SHA-1: b9212880b9ea89daad6a110918cda9c69ac08d05 SHA-256: d3addc82e8c0afc5169f07c5702ab028ffd0df7c23c00096fb0ad98acc705931

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress upload directories and disposable hosting, suggesting it functions as a link farm to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9945

Heuristics 6

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.
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://synerhu.ru/uplcv?utm_term=ejercicios+nomenclatura+iupac+quimica+organica PDF link annotation
- http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083748ec1576---76192708045.pdfIn PDF document text
- http://www.siscbolivia.com/admin/uploaded/fck/file/fuzetuwiruriwu.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/8a0b96f35bf087edd8b1e3517b8afccd/356506928.pdfIn PDF document text
- https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cdd460051---xupugudiniziga.pdfIn PDF document text
- http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a8497cd257d---wixuzudazerume.pdfIn PDF document text
- http://bilmatbasim.com/userfiles/file/90564051831.pdfIn PDF document text
- http://libertyquad72.fr/userfiles/file/43783598373.pdfIn PDF document text
- http://614move.com/clients/4890/File/bukuzixunoxal.pdfIn PDF document text
- https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/2aatpdo8f07qmm3n32torhcuci/28379350731.pdfIn PDF document text
- https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607eebad944a9---jejigavobatobivowixiremi.pdfIn PDF document text
- http://efuegypt.org/userfiles/file/zuduzizapoped.pdfIn PDF document text
- http://vet-arrighicolangelicristilli.eu/userfiles/files/sedugifujitajelivip.pdfIn PDF document text
- http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081f44760e80---63205898355.pdfIn PDF document text
- http://briquettemachinery.com/d/files/vakepifawuxozukotavofuk.pdfIn PDF document text
- https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/cp173v92v10sef93p9i4r6qcgg/xusaluzitivafinulase.pdfIn PDF document text
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a786a564c---22177362119.pdfIn PDF document text
- https://pass-eco-energies.com/ckfinder/userfiles/files/50317346400.pdfIn PDF document text
- https://shoppingplanet.ro/ckfinder/userfiles/files/refevotiwurodozasil.pdfIn PDF document text
- https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086499d07bc6---ragubamufojukeni.pdfIn PDF document text
- https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160719f6fdd8db---17624541212.pdfIn PDF document text
- http://augustaelectricalwork.com/editorData/file/xuzetaxuk.pdfIn PDF document text
- https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/9efa938d6ef687c6f8e218e93ceb6b2a/1108213790.pdfIn PDF document text
- http://softwarefactory.nl/images/file/wagujejemegimusuzisogaw.pdfIn PDF document text
- https://sacc-la-chaux-de-fonds.ch/fichiers/file/podudibotumifufidodopino.pdfIn PDF document text
- https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/hqq93d6ufbh4btgud99ptpipf8/45635341731.pdfIn PDF document text
- http://sanitaerprofi.ch/fckeditor/editor/images/file/wozodisudumukezaxasutaz.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_off0000cb36.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB36	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e348.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE348	17484 bytes
SHA-256: `a57e81e2d69688574aaf08caaf4bb78e1deb95a7daea6c336dadbe1f969d75cb`
`font_02_sfnt_off00010f66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F66	11076 bytes
SHA-256: `0112785481d0b61bd44674724518f8faeec42488c0e96eedfe0327742676569f`

Open this report in the interactive analyzer, or submit your own file for analysis.