Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc22e24ceedfcb8…

MALICIOUS

PDF

83.5 KB Created: 2021-08-30 07:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: d8fef020de905c37a37e238ed32ec562 SHA-1: d308486b9ca1e136a7f103a623e9cccfa0739f89 SHA-256: 9fc22e24ceedfcb804d08658b968bc54889e8d46a9d6ff3b7ffd05dd395ccab1
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. Heuristics identified it as a link farm, with multiple URLs pointing to potentially compromised or disposable hosting. The presence of numerous links, including one hosted on 'neodev.space', suggests an attempt to direct users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://zlatartopalovic.rs//files/tobekufevobolutavuziw.pdf In PDF document text
    • http://juditphotography.com/picture/userfiles/file/lawuxoxasebewejipupusa.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/fibiwororad.pdfIn PDF document text
    • http://glampingcaravan.com/userfiles/file/20210819121218.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f9432fe9e---30725508181.pdfIn PDF document text
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/faxora.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160c5723a6f22a---33783217518.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/90586105770.pdfIn PDF document text
    • https://guijek.com/userfiles/file/46333787563.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609251b706288---44316639392.pdfIn PDF document text
    • http://abnicum.com/files/file/48335672558.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/kadijejarenolebiwebubu.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/xatefufowofugizurogopa.pdfIn PDF document text
    • http://parfumkin.ru/files/files/lunetomodabokerumezij.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd1aaa8cea6---dinarapotavav.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/f72a66a2ecc481ac4adee682f670a98c/voliruk.pdfIn PDF document text
    • https://homestayhoian.vn/uploads/image/files/1307016502.pdfIn PDF document text
    • https://ibextrail.com/editor-images/42559995941.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5eaf6870c---84233946121.pdfIn PDF document text
    • https://ebdaatcoop.com/userfiles/files/14680732322.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/gigegewatexozawopom.pdfIn PDF document text
    • http://ghnservizi.com/file/89423260494.pdfIn PDF document text
    • http://lejuriste.ru/files/file/64760119283.pdfIn PDF document text
    • http://www.celso.org/download/bofoxirunolomoguge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=the+hacker+playbook+2+pdfPDF 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_off0000df5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5A 18256 bytes
SHA-256: 4a55f2d6a7a570033f0161626f0391012121a5a325c72a22c64af6c3bb831a72
font_01_sfnt_off00010eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAC 10684 bytes
SHA-256: 167bae84658615f175a7abe4bc08e2c4f80965d5eef2e90c8307dc6bfdbcd9da
font_02_sfnt_off0001272c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1