Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48c52e20d08507b…

MALICIOUS

PDF

39.5 KB Created: 2020-11-09 05:11:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 293c226292555808bab8495449977ec8 SHA-1: 1cf68eb2ef02911913147796809d88b7a9db3d6d SHA-256: e48c52e20d08507b191a5bb9e847a38daca9977cc22defe2d7da9c290feb3a28
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of numerous external links suggests a potential for distributing further malicious content or leading users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffking.ru/123?keyword=bowflex+power+pro+xlt+manual PDF link annotation
    • https://tugarekuxu.weebly.com/uploads/1/3/4/3/134307697/fd1dcc0c5f2.pdfIn PDF document text
    • https://jinukomerum.weebly.com/uploads/1/3/4/5/134587773/zekiwafokaxudaxon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407780/normal_5f9acdca702c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417037/normal_5fa42d74737f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://silanof.files.wordpress.com/2020/11/tortora_anatomy_and_physiology_globa.pdfIn PDF document text
    • https://nerofisela.files.wordpress.com/2020/11/managerial_economics_12th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19f3fcc9-9b5c-414c-9712-463f469e5cd1/the_walking_dead_-_volume_31.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/96986308359.pdfIn PDF document text
    • https://damafebu.files.wordpress.com/2020/11/twinstar_telescope_60300_manual.pdfIn PDF document text
    • https://sirilab.files.wordpress.com/2020/11/wixasidivumazenogodoz.pdfIn PDF document text
    • https://rebozowenopo.files.wordpress.com/2020/11/bisejefipabekenobup.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/73005384477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de418f71-40b3-427e-9bf3-09da15307b05/57704100005.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_off00005d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D25 5080 bytes
SHA-256: 2351d488460b00aee1fb301c071556d87baa718cd2d4bc3aafdb9ebed8a144c9
font_01_sfnt_off00006e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6F 10296 bytes
SHA-256: a6306e2aece5361a93f84d3fe8154e76aa0ab65fe0d4e596559a363ffe7651c4

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