Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd454db53bf6f6b4…

MALICIOUS

PDF

75.5 KB Created: 2021-03-24 16:10:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b6b449c48b4fa3ba8988e7bf7a22b76f SHA-1: d940e4470d777b212cc8d5d9bd2dabda1a50a533 SHA-256: dd454db53bf6f6b49271c4b12b5cc0a5a61cce980d78cb04c8eb3a2729cf1ac0
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure strongly suggest an attempt to exploit users through deceptive links, likely as part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/wix?keyword=exodus+kodi+16.1+apk PDF link annotation
    • https://panezoso.weebly.com/uploads/1/3/4/6/134697542/5126867d4.pdfIn PDF document text
    • http://harmony-market.ru/16187536181wrr3v.pdfIn PDF document text
    • http://peskomment.ru/pdf_zu_docx_konvertieren_macaxyvo.pdfIn PDF document text
    • http://jushq.pro/august_month_current_affairs_2019_testbookn7tfz.pdfIn PDF document text
    • https://modizotu.weebly.com/uploads/1/3/2/7/132740501/3230559.pdfIn PDF document text
    • http://trujillostacoshop.com/shuffleboard_table_plansm4ztl.pdfIn PDF document text
    • http://pestore.pro/952844476687bt1o.pdfIn PDF document text
    • https://dofigova.weebly.com/uploads/1/3/0/8/130813881/jejiwitivijub.pdfIn PDF document text
    • http://bonmarket.site/336196905430lw9j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/child_care_subsidy_application_manitoba.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/66502595267.pdfIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_3e0d6eecaaa14820a1b81c190c88a866.pdf?index=trueIn PDF document text
    • https://acfcda0b-1795-4b40-aedc-9a0bc13047ce.filesusr.com/ugd/89c6ad_3be907e86de9487dbc11a3671519d952.pdf?index=trueIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_d895fef88fdd4b3e94ba52b86b586848.pdf?index=trueIn PDF document text
    • https://28a90398-13b1-4b58-b54c-ed045a6bddf2.filesusr.com/ugd/7e9e1f_2761e7adec7b4e51a4b8dc63a710febe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/21096235325.pdfIn PDF document text
    • https://536432c6-7160-4795-b32c-faef63afc1c8.filesusr.com/ugd/5e2347_61f745b44e2e4054ac2e5c34521fe9c3.pdf?index=trueIn PDF document text
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_79082c6d84c640fda9237599dc5256ca.pdf?index=trueIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_50668be438b64845a4fca0a9a003fb29.pdf?index=trueIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_9b53161205bf4effb01cdff9ed977f9a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gurafoga/4th_grade_math_worksheets_printable.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE761 5152 bytes
SHA-256: f68f6186635e58a944549a74c7f3a7d0ec306bafdb22876d4680982ac9847b82
font_01_sfnt_off0000f90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90C 11340 bytes
SHA-256: f2b26e270f4e0d88339d8b4ec44be9043777fc3fa886a9210e2d8f0d396b50ba