Malicious PDF — malware analysis report

Static analysis result for SHA-256 486599e348757848…

MALICIOUS

PDF

109.4 KB Created: 2020-12-24 16:57:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4c21e17c38be953a5d5e52be8c8fcad1 SHA-1: cfe1dc1028cd83143d55fae6608b33b233faa609 SHA-256: 486599e348757848e9a8408e451dc1fde4bf3b169df85ab682da04e3f490bd19
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs pointing to other PDF documents hosted on disposable domains. The primary purpose appears to be SEO manipulation or distributing further malicious content, rather than direct user interaction within the document itself. No scripts were extracted, but the structure strongly suggests a malicious document delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://trafficel.ru/wb?keyword=does%20addy%20die%20in%20z%20nation%20season%204 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459054/normal_5fb4dc1233374.pdfIn PDF document text
    • https://ragulifogikub.weebly.com/uploads/1/3/3/9/133986704/4f60cd0313a2ee2.pdfIn PDF document text
    • https://ramitafot.weebly.com/uploads/1/3/4/3/134340854/07b9e4a6ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419218/normal_5fb4860aededf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426550/normal_5fe4aa4e0dfb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446642/normal_5fa29c698594c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474449/normal_5fceb3303afd0.pdfIn PDF document text
    • https://garimawenipasad.weebly.com/uploads/1/3/4/5/134595154/dikibobixamosu.pdfIn PDF document text
    • https://melijezaziwoni.weebly.com/uploads/1/3/4/8/134851492/e76cfec2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f86fe80b61c3.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/37bcd8ac-4c98-44a8-9c64-d52ea8c66bc2/mumajazuduratifo.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/92213713170.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14734 4932 bytes
SHA-256: b38b95ac75e4dcdf9c228e730320b5234c640c09bdbd7dd511f62a2bfe627e15
font_01_sfnt_off0001582d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1582D 13596 bytes
SHA-256: 89982bcb0acec3c681d371f8b6f7f9e2ff28a3947e8a38ad5182f522138c5d1c
font_02_sfnt_off00018405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18405 16212 bytes
SHA-256: 612e663f347a72eeabf29f77a9f79e730ec6d43f530522303a60f265ceed2fc6
font_03_sfnt_off0001994a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1994A 6084 bytes
SHA-256: d33ad49540675c0857a2260a28d8de266a1b9b0f45717d25e8677da85b8aa7f4

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