Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5203b755cc8b331…

MALICIOUS

PDF

82.6 KB Created: 2020-11-04 22:19:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 64694599578702381b678181463b4d1b SHA-1: d61137e1e01aa53a2abbc4ad789e191ac219ced6 SHA-256: d5203b755cc8b33194c8c9307a42a4ca862082e1ccdb59060979d9917be0d1fe
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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.
  • 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=seagate+backup+plus+manual+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5f975945e9530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402280/normal_5f90aa8687889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388279/normal_5f8e432eebb72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5f8f47adcd0b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5f8feaa934796.pdfIn PDF document text
    • https://sarununow.weebly.com/uploads/1/3/4/3/134366188/4720627.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://uploads.strikinglycdn.com/files/a85ca326-6f7c-4862-b95a-74eed66b6098/archero_farming_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da4f3174-4dc1-4fdb-9c99-8908a93ac007/ladofuvivutobuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ebfc64c-0731-4e56-9d30-5e91648840d8/91537959230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb963069-2aac-45e0-9186-8c34608dec2a/65834655782.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/45866081324.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/tavozekoxakokobuzapuzit.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/padivimimitilifovotoso.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2AE 8008 bytes
SHA-256: ab34124c913aa2a60e85e18e60a2da96a20a4581c79b073ffe99c1db7c957b4f
font_01_sfnt_off0000cdd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD8 5528 bytes
SHA-256: 648faf6c1d3eefe79b9192829c929bdd55611e708f72a6ef1760f16d264b2c7a
font_02_sfnt_off0000e09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09E 21172 bytes
SHA-256: 658f6389d2f92f4c2a2205362d7e8e2c530ee390ee3abd40efacf66cdbb399a7
font_03_sfnt_off0001179d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179D 16208 bytes
SHA-256: d6691d7f4c8b10877bd25af26bde883dd7762551e2d4f138d151c425b6578ade
font_04_sfnt_off00012ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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