Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb3b3c55a19229e…

MALICIOUS

PDF

79.4 KB Created: 2021-09-21 13:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 026aa315bd329a720b299f18878518f5 SHA-1: 98a33152cde6fc058a8baa2445675200cc141223 SHA-256: fbb3b3c55a19229ea2979dd9ead1abbc4e40a50a5674bec6659fe6f005c1b5ff
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the nature of the link farms point towards an attempt to exploit users by directing them to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://coretry.ru/uplcv?utm_term=green+farm+3+mod PDF link annotation
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16137086855895---72514557047.pdfIn PDF document text
    • http://w-w.cn/isee/pfm/cms/uploadfile/fck/file/72139512795.pdfIn PDF document text
    • http://goodlack.cz/userfiles/file/gukejo.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132787ed071a---xedukemanaponaronevosak.pdfIn PDF document text
    • http://aurastaffing.es/upload/file/dosunofobaj.pdfIn PDF document text
    • https://superiorservicesandsolutionsfl.com/nbloom/fckuploads/file/vijijas.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149231bd7f04---zesozikotikunareb.pdfIn PDF document text
    • http://macierz-grodziec.org/files/file/relafuvojuzawovinute.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/11035882831.pdfIn PDF document text
    • http://szm.hu/userfiles/file/62586108582.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16148042ae1645---7810395117.pdfIn PDF document text
    • http://avesta-hmora.boj.se/uploads/userfiles/files/wikuvoxetelawusapetun.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/kasoxow.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/xananufamakuwekerabew.pdfIn PDF document text
    • http://philboyd.com/77075331864.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/59743952330.pdfIn PDF document text
    • http://carraracucinecomponibilitrapani.it/userfiles/files/46587469570.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/89787490167.pdfIn PDF document text
    • https://sitycare.com/FCK-UserFiles/files/boxivikatejigatosev.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/xodotibomodowogugigikokof.pdfIn PDF document text
    • http://juentai.com/userfiles/files/musetirenukadunovesi.pdfIn PDF document text
    • http://rosg.net/sa_upload/userfiles/file/20210914110322.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613f43e60b1af---xinusuzukolivufilubarenad.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.

FilenameKindSourceSize
font_00_sfnt_off0000d299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD299 10324 bytes
SHA-256: 9870e35a1b3aeabbdf5c88585a6f2fbe4733bebe4802c797e36b66ff1570072f
font_01_sfnt_off0000e9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E1 17884 bytes
SHA-256: 75d52ab371ab70d1d40506bedb8a7a138177aacb5a4fa227ec348693e3026b51
font_02_sfnt_off0001185a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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