Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3b47ec56532a41…

MALICIOUS

PDF

88.6 KB Created: 2020-11-08 21:36:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 184272012bee1869707d93c6416b4a17 SHA-1: 97e4aa0382edde9249e0f05ba113043b3d168143 SHA-256: 2b3b47ec56532a41c8f3afc01aaa2a8bee09d8e9a9d4a8f343edc5067f3ca284
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://cctraff.ru/123?keyword=wwe+2k+apkpure In PDF document text
    • https://pativezakuzorad.weebly.com/uploads/1/3/4/2/134266084/pebamobaw.pdfIn PDF document text
    • https://depufavekozumel.weebly.com/uploads/1/3/4/0/134017714/9dcb34a5408a.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/wasururiwe.pdfIn PDF document text
    • https://bofufawikifof.weebly.com/uploads/1/3/4/2/134235483/8221354.pdfIn PDF document text
    • https://detaliwaka.weebly.com/uploads/1/3/4/3/134340587/suduzerevajipo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f926196e048c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426974/normal_5f9cff8e1411f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://lavawuxalefi.files.wordpress.com/2020/11/14595116568.pdfIn PDF document text
    • https://janavevuxan.files.wordpress.com/2020/11/vudoneg.pdfIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/67728004733.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/bodybuilding_workout_log.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/40165720136.pdfIn PDF document text
    • https://temobozuz.files.wordpress.com/2020/11/89830651401.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11475 4440 bytes
SHA-256: b9a3f125737f3c1ac8df01037e08a7f874d224e0c15e566965b663fcb759ce2b
font_01_sfnt_off000123a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A9 10576 bytes
SHA-256: 45c21f0ac97a39fa6f819cdd4447b5af5eeb09d8df06de59982a38feab3d4535
font_02_sfnt_off000147a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147A7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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