Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf918a706d20c482…

MALICIOUS

PDF

73.8 KB Created: 2021-06-08 04:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 46e65724b053daefa392639d1856be17 SHA-1: c43a74ccc54115136cedfa76b59967b50de961da SHA-256: cf918a706d20c4820a15575af16d0990ec008163ecfea4a458ba2a507750ce18
136 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a PDF_SEO_UTM_REDIRECTOR_LINK heuristic points to an image lure designed to redirect users to the URL https://philabc.ru/pbw?utm_term=addis+ababa+sub+city+map. This URL is likely used for phishing or to serve a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://philabc.ru/pbw?utm_term=addis+ababa+sub+city+map PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385612/normal_606da41b155b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459466/normal_6068e3d202335.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4373749/normal_60b2ef97c7d94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414491/normal_5fc609c70ea3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446765/normal_603789f336d38.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4402956/normal_60b792b8aa908.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466664/normal_5fcb430b0c89a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403429/normal_60293adf3c9f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481825/normal_600c6805d2901.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408348/normal_602141ad2cd5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476765/normal_605926ac194fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366340/normal_5fc6954ad13ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426413/normal_5fde0be3a34fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374715/normal_60132f9ccf9f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408601/normal_606336ccb148c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b42d85e5-b5d7-4726-ae4a-10646eb7407a/actividades_de_formacion_civica_y_etica_primer_grado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51cdc3f1-42df-4283-b483-ba85d78b94b7/99003079621.pdfIn PDF document text
    • http://wuranosa.pbworks.com/f/gofetafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecc42761-5fbe-4c9a-a115-41e05b9b187b/why_is_my_deep_freezer_not_getting_cold.pdfIn PDF document text
    • http://vevokofeju.pbworks.com/f/what_can_cause_lymphedema_in_the_legs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e43180d3-ea0d-4581-aa36-ec0b3432fcfb/84891601725.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_off0000d93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93B 3172 bytes
SHA-256: dc85516e4740f6d4c3f2060750eff1e60fdf2359d778885ea932b4df3825ad5c
font_01_sfnt_off0000e494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE494 5324 bytes
SHA-256: 201310d27625dcd8fdf81c08bf215870d378439355df7eb9364023859f591a87
font_02_sfnt_off0000f6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A5 10132 bytes
SHA-256: 057697452e3a825d2b62dd188fe7422c3cb5ccc6d7b96c1531f0816420986cd1