Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b9edc1ebad37f2c…

MALICIOUS

PDF

85.5 KB Created: 2021-09-01 03:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e5f6938f7cfbe682d2caf172b88f0b90 SHA-1: b9ddd3b2d82ab0e347e047dd73754ebad1e328b0 SHA-256: 6b9edc1ebad37f2c59c4d67e07ac2801f6d852928cba0b26239f93abcbdea461
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to potentially compromised websites or disposable hosting, likely to distribute phishing content or second-stage malware. The document body was unreadable, but the heuristic firings strongly suggest a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://baovephuongtroi.com/vietkiendo/upload/file/vilerebuxetasafideduwedif.pdf In PDF document text
    • http://jljemc.com/upload/files/98074743222.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/hqtuo19v2c8uk3fp1bbn19liag/87967840050.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/96639466229.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/c9ad411cc084fa27eb0899cf549e9ebf/93022186337.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cd634333489---17212207532.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/270028547434.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/70561988821.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161243f5783a8c---89525386971.pdfIn PDF document text
    • http://fitviewer.de/files/file/lopevitutif.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210715_321F93CB0AA9FB09.pdfIn PDF document text
    • http://tencanpowder.com/d/files/voriwunomeweb.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/40759991272.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1611d834778186---82699513601.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/jawunitekag.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a102ad907f0---tuvokelurigoxiwuzedi.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/340895c83faec70ad3bc22edc897b240/bifamixotawipux.pdfIn PDF document text
    • https://hirurgija.me//files/tonetoveseradasivuz.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/kurujixutoviwof.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/6fb914bc7fe6cd11b536b69dc98e39fa/fexaxulitidijinewal.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/57676915626.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/5a59002614516e881ac8eaeaea5e2375/44550949486.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/4c6129a09a4c5ef6f9c28a35209e8bde/55710741138.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160915ac3bde57---segadirix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=class+11+chemistry+all+formulasPDF 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.

FilenameKindSourceSize
font_00_sfnt_off0000eae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE9 16992 bytes
SHA-256: eaa41b28621c4e8c60c174fa8b5f97bed40aecfec7febeef68879a45affd11ac
font_01_sfnt_off0001163a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E51 10796 bytes
SHA-256: a402aa0547110f26dc3c4b5d73f8a3c5080f6e7d69999b53efe57a9bb0c18cd6

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