Malicious PDF — malware analysis report

Static analysis result for SHA-256 e149050aa86efeef…

MALICIOUS

PDF

50.0 KB Created: 2020-10-15 02:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 422264063622a3fcc29c3cdbc8892f24 SHA-1: e8dd8b090e5a381b3246765708e31ed6cfce06d1 SHA-256: e149050aa86efeef83ba3e4768a126f2c995a516ae478ba53a8f499d2e6b6e64
124 Risk Score

Malware Insights

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

The PDF contains embedded links designed to redirect users to malicious infrastructure, masquerading as a free book download. The ML classifier strongly indicated maliciousness, and the presence of multiple links to disposable hosting further supports a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://gettraff.ru/123?keyword=sam+harris+books+pdf+free+download In PDF document text
    • https://site-1043124.mozfiles.com/files/1043124/zowenenezesib.pdfIn PDF document text
    • https://site-1039864.mozfiles.com/files/1039864/7339682388.pdfIn PDF document text
    • https://site-1038758.mozfiles.com/files/1038758/zosagikofagimoman.pdfIn PDF document text
    • https://site-1040984.mozfiles.com/files/1040984/obat_muscle_relaxant.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kinufijozulof.pdfIn PDF document text
    • https://ruwopevod.weebly.com/uploads/1/3/1/3/131397973/porenakis.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/9b53ec72f.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8925184.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/tikinapulusaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f87156fbc681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f870d801b7df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5f87858034ecc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f86fd012b4de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f874ed2c130b.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://cdn.shopify.com/s/files/1/0478/1113/3599/files/transmission_stop_leak_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7679/4021/files/kuzaripufa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6021 5388 bytes
SHA-256: eb52b8837dc3dbb58ba4230c6c11b695c342199dc57194a56c2b28df74436772
font_01_sfnt_off00007242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7242 10456 bytes
SHA-256: 51d6e16739913c8df7d7a5c178a8c65180f99d4365b809328549a508d76d26f0
font_02_sfnt_off00009630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9630 16492 bytes
SHA-256: 782dfc45379574fd9aca7f1dbdc0dbaa76112229e48e300ae8671c21e4895379
font_03_sfnt_off0000ac91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC91 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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