Malicious PDF — malware analysis report

Static analysis result for SHA-256 e451627a8203dfac…

MALICIOUS

PDF

73.0 KB Created: 2021-03-10 13:00:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9c5a3ad844d5c20f41a81f5fdc80ddc6 SHA-1: 4e6db50e6143f4a0149b23ba8301494fb49fd66b SHA-256: e451627a8203dfacfc12c2b36655b9acebcb626f46186d66ca52d2ca7def4b6d
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, and one critical link to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or scamming purposes by directing users to malicious websites. No scripts were extracted, but the PDF structure itself is weaponized to host a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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.
  • 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://crophysi.ru/wix?keyword=rain+dial+rd-600+manual In PDF document text
    • https://peliretoru.weebly.com/uploads/1/3/3/9/133997281/13114cb0d1de468.pdfIn PDF document text
    • https://dolibaradodusop.weebly.com/uploads/1/3/4/5/134595809/b29b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367650/normal_5fed58885b214.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456699/normal_6022d56bd4be4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450240/normal_60417312b45e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387244/normal_603014e199e48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496146/normal_6002d2851428b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374682/normal_5fcc01a027fe4.pdfIn PDF document text
    • https://roxowuvunesoneb.weebly.com/uploads/1/3/4/8/134889799/gunoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403952/normal_602a83be24fda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449399/normal_5fd0bd0368c8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495531/normal_5fc86b4dcd77a.pdfIn PDF document text
    • https://xufaxasevejanog.weebly.com/uploads/1/3/4/8/134886042/7347412.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6e678f60-abc6-404c-883a-cd1729fdffee.filesusr.com/ugd/e4291f_1bba5663f644433b9ef99fbe29c8231d.pdf?index=trueIn PDF document text
    • https://e9593579-f51f-4dc6-af55-2543ab512b45.filesusr.com/ugd/37952c_e552809edff44da8a64fb3761e5d951c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/037f781b-9fdf-4403-955b-d5355ce41e93/10187522871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd8adcf0-abe1-4a15-afdd-e6e74018c31f/fokaboxikituratedolip.pdfIn PDF document text
    • https://14319df0-7947-4f0d-bbb3-eaa17d5eb23e.filesusr.com/ugd/c45f38_70d541b6c2754ff79e16260c7153030b.pdf?index=trueIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_7428d2646d5344089e433f9ea1ec3130.pdf?index=trueIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_0d054c02f103434cbdf07526f292de82.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/61d91d84-caa4-4249-8ee6-5dbb06a133c5/luwodofebivu.pdfIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_21b564dac1e041c8afe88c7e9f3e5f0b.pdf?index=trueIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_5ba4406df21148aebcfdafaa51e80ee0.pdf?index=trueIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_eca0a2e341704f058fbf8193f62de6fe.pdf?index=trueIn PDF document text
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_c7a2deb8057e4d9b97c5433f2f94e63a.pdf?index=trueIn 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_off0000e123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE123 5128 bytes
SHA-256: 417497f3a1e3d3a11b8f77661b579afc73b70a15c350022f56b483c2b991e6fe
font_01_sfnt_off0000f289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF289 10476 bytes
SHA-256: 46e374d2f1cfb2fc29283d22a1246a2aaa77d711deea7fe409c71e558e9c8927

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