Malicious PDF — malware analysis report

Static analysis result for SHA-256 79dd7a9864496976…

MALICIOUS

PDF

42.5 KB Created: 2020-03-29 08:38:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-09
MD5: de092d098f9cafa10b7f59748bf25e93 SHA-1: 4b4d0d7702da24763b82071e42757ae4051898a0 SHA-256: 79dd7a98644969768de25d92f781fa1dd6c6c138a09538f7a156df1656927e9a
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of numerous PDF_SEO_LINK_FARM heuristics supports this. While no scripts were explicitly extracted, the PDF structure itself is being leveraged to host and distribute links, potentially leading to further compromise.

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://74-123-77-236.mgwnet.com/uploads/1/3/1/1/131164100/131164100.html#ventajas+y+desventajas+de+motores+de+corriente+continua PDF link annotation
    • http://metamixis.com/uploads/1/3/0/2/130291475/5669661.pdfIn PDF document text
    • http://sellgoldny.info/uploads/1/3/0/7/130776002/lurovimap.pdfIn PDF document text
    • http://eduexchange.org/uploads/1/3/0/5/130588550/8525522.pdfIn PDF document text
    • http://www.klausvaillant.com/uploads/1/3/0/5/130588943/dukafonigesan-fejut-bevonufibikijam.pdfIn PDF document text
    • http://organicfromjosh.com/uploads/1/3/0/6/130639524/munovavupe.pdfIn PDF document text
    • http://ucsfophthresidency.org/uploads/1/3/0/3/130323959/dd933c9.pdfIn PDF document text
    • http://thecommonstitch.com/uploads/1/3/0/7/130740017/kisis_luwof.pdfIn PDF document text
    • http://villaggiobaiadebahas.com/uploads/1/3/0/8/130873783/resokipixo.pdfIn PDF document text
    • http://www.bioinnovationasia.com/uploads/1/3/0/8/130814715/sufax.pdfIn PDF document text
    • http://beautifylbi.com/uploads/1/3/0/7/130738778/39880c83282.pdfIn PDF document text
    • http://ellashaka.com/uploads/1/3/0/4/130492771/2233747.pdfIn PDF document text
    • http://danicagoward.com/uploads/1/3/0/5/130550688/3509633.pdfIn PDF document text
    • http://transusxpress.com/uploads/1/3/0/4/130488875/7c8c8506cc1.pdfIn PDF document text
    • http://nesyb.net/uploads/1/3/0/5/130550857/8356381fb4c8dd.pdfIn PDF document text
    • http://striveacademics.com.au/uploads/1/3/0/4/130483765/sunazofisixubemit.pdfIn PDF document text
    • http://procine.co/uploads/1/3/0/2/130288326/11b7093d7b3b.pdfIn PDF document text
    • http://cpanel.modtechgroup.com.au/uploads/1/3/0/5/130538902/1784784.pdfIn PDF document text
    • http://northcoastfoodtours.com/uploads/1/3/0/4/130488316/somoxudababepoz.pdfIn PDF document text
    • http://expertfoundationrepairsugarland.com/uploads/1/3/0/7/130740077/wuzilarokaketunufuli.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

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C61 8716 bytes
SHA-256: 85d58a5646aff4afbf948210d3419dba4c4a601234efc3db6aaa8e6b22ad8a67

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