Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa681d84d1c06a00…

MALICIOUS

PDF

65.6 KB Created: 2020-12-17 21:54:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 49e658126e393e368a789faeee51ce9f SHA-1: 70d69a3fce40ce877f2a0e70299f70b2d5475a76 SHA-256: fa681d84d1c06a00c7e2b8b43a7b946cad11b04282db9ec4b53061cdadde161a
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a coordinated effort to manipulate search results or distribute malicious content. While no scripts were explicitly extracted, the presence of malicious links and the ML classifier's high confidence point towards a phishing or content-distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=textview+bold+android+studio In PDF document text
    • https://wapapoda.weebly.com/uploads/1/3/4/5/134581042/4867810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5fb8305ad4ab4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455642/normal_5fad5dc5ac807.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_5f8d484b09e1c.pdfIn PDF document text
    • https://doritader.weebly.com/uploads/1/3/4/8/134885844/medopuzu.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/lawakux/schwartz_surgery_absite_and_board_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25c5182c-819e-4fa7-a25b-5064f0f8dfd5/crear_vistas_en_mysql_con_dos_tablas.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/65779660824.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/zimowevesamepibikufovuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/bozananabopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/067e1a11-68d0-4b81-9fc3-94abd0c4828d/ririkudamugalopebe.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/gesivaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/439e8bb4-7d62-4370-9ee9-a22a9574cbb0/is_camp_green_lake_a_real_place.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_off0000c217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC217 5128 bytes
SHA-256: 0be0306c322794d46066fab2b0910919624438bb2713a82c628c81f5a06241d5
font_01_sfnt_off0000d3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A7 11188 bytes
SHA-256: 049a9130a883e68d5900a6c4b98b5914e4c59377755382577fef2cfe88f82634

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