Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be893c740879c59…

MALICIOUS

PDF

47.4 KB Created: 2020-10-28 02:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 39cf0abebfd0eb12d139b327a7ab269f SHA-1: e8d54b2b8f09f3d34f48e076749ecf4d214e67cb SHA-256: 6be893c740879c599c71a7a0f3b0b5ca6113ceee12200235702a445101641fda
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to external PDF files and a known malicious redirector. This indicates the document is designed to lead users to potentially harmful content, likely as part of a phishing or scam campaign. The ML classifier strongly supports the malicious nature of this PDF.

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/strik?keyword=islamic+center+of+cleveland+history In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_5f8af63d60e23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5f98aa13c928d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f875b6ec64ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378628/normal_5f8efa0b5886e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_5f8c9930bdd23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381738/normal_5f8b749b28d18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367640/normal_5f87efccdd564.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/xijakekepimiren_tofedarolis_gokulixekedetin_solisi.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/wizuzinu.pdfIn PDF document text
    • https://kavirozix.weebly.com/uploads/1/3/3/9/133999962/6733330.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/d1fef4448b24de.pdfIn PDF document text
    • https://tinijaxiri.weebly.com/uploads/1/3/4/4/134440903/1daa77dee.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/gatazezizujebap.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/309006dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379852/normal_5f8c2a8109880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386834/normal_5f91b3327b95a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f8e8a05ca0f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5f88d37fa1155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f926cdc3f05e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6845/9670/files/cheat_helix_jump_level_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/63443559807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6993/1671/files/webasto_hl_90_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9270/3915/files/acv_rehabilitacion_kinesica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5231/5036/files/11539710283.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_off00007a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3E 5360 bytes
SHA-256: 55120c40964aeeadda6e1d84f6bc9b3cdaf7da3a4a844512cf8b918927a74d8d
font_01_sfnt_off00008c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C43 10428 bytes
SHA-256: bf7b232d5b77e8902cefa8cf78cf7ff30a23b2041b09d86993b16ab51bc5be46