Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6be2c83262e0c8d…

MALICIOUS

PDF

69.7 KB Created: 2021-10-01 20:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: cd0a1ea657922c2f498241a2fb30d278 SHA-1: 1d52b4be1a5501875860c369fccacdfa3c9dfc3f SHA-256: f6be2c83262e0c8db2dc4221593e4f15ac5f89738124160a4964aab67bc0ae62
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to various websites, including those hosted on compromised CMS platforms. The embedded URLs suggest an attempt to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://dangeloremodeling.com/nbloom/fckuploads/file/guditededapubefopo.pdf In PDF document text
    • http://jshtextile.com/UserFiles/file///doxakazebebebato.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/be90a02f2558811b8384752a5be43f3e/80948789644.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/62237404318.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/41831625913.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/83968341313.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///8638284678.pdfIn PDF document text
    • https://sklep-pinokio.pl/web/uploads/files/2410143590.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/ketivorimuvuvapisa.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/5215409609.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/97918326272.pdfIn PDF document text
    • http://tindangnhadat.vn/upload/files/45109460195.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/161413f864ef4a---98126023618.pdfIn PDF document text
    • https://ud-hobby.com/images/Upload/file/48951827129.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161366f18c07e5---21281929043.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8f71b658c---dudijugunu.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/9531239337.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/lefajineriliwavo.pdfIn PDF document text
    • http://cortocircuito.trialpanel.com/images/Upload/files/73856311919.pdfIn PDF document text
    • http://olympicthesportshop.in/uploads/migedibelasixo.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8e0a333b4---16241045413.pdfIn PDF document text
    • http://sb555.com/photo/file/luzesiburufukapuga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=get+vbucks+freePDF 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_off0000b191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB191 10240 bytes
SHA-256: bcaa9fe619f2724a4c758384087fc8221e2fd84a10930beeb2b7228c084b0e83
font_01_sfnt_off0000c8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D0 15908 bytes
SHA-256: 85c306bc7654709062d741a01f2ce4b54ef717727cfa3820d8d9a07dcf301504
font_02_sfnt_off0000f188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF188 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1