Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f38cfd0bd14972b…

MALICIOUS

PDF

43.1 KB Created: 2020-06-02 00:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 90f9ec4519a8ec7d442260114016d4f1 SHA-1: 92ee7cd7ea11f2e2bc6d2168f5f450ea086e0289 SHA-256: 6f38cfd0bd14972bd1f1f16e55a6ba3d21135d0aebd5618cfbf7bfa48bc43da6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF file contains a large number of external links, many of which are structured as SEO-optimized links pointing to other PDFs. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'basic English pronunciation PDF'. This suggests a link farm or SEO poisoning attack. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://suntidetravels.xsideas.com/uploads/1/3/0/2/130288924/130288924.html#ingles+basico+pronunciacion+pdf PDF link annotation
    • http://jaomarketing.com/uploads/1/3/0/7/130740378/727a4ef004f7767.pdfIn PDF document text
    • http://mattdanielmusic.org/uploads/1/3/0/4/130490875/3214457.pdfIn PDF document text
    • http://webmail.manuelastef.com/uploads/1/3/0/3/130323603/boxopuzutuj.pdfIn PDF document text
    • http://remote.thewoodsumc.org/uploads/1/3/0/2/130291593/bufimisob.pdfIn PDF document text
    • http://tinypaperdragon.com/uploads/1/3/1/3/131398278/dca05214.pdfIn PDF document text
    • http://suntidetravels.xsideas.com/uploads/1/3/0/2/130288924/terms.htmlIn PDF document text
    • http://suntidetravels.xsideas.com/uploads/1/3/0/2/130288924/dmca.htmlIn PDF document text
    • http://suntidetravels.xsideas.com/uploads/1/3/0/2/130288924/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xubakokupowi.files.wordpress.com/2020/05/terit.pdfIn PDF document text
    • https://porugisi.files.wordpress.com/2020/05/wakoduvadeniganuwore.pdfIn PDF document text
    • https://tekifevozeba.files.wordpress.com/2020/05/49902547232.pdfIn PDF document text
    • https://zikoraxelu.files.wordpress.com/2020/06/68691555104.pdfIn PDF document text
    • https://kozujatuvi.files.wordpress.com/2020/06/96618530531.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C5 12724 bytes
SHA-256: af353366455b89275e802c09aa0bade17d11b86ce4dc1beb8e88c0f75d959b45
font_01_sfnt_off000089c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C0 16312 bytes
SHA-256: 028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b

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