Malicious PDF — malware analysis report

Static analysis result for SHA-256 8969a28d1cc93519…

MALICIOUS

PDF

39.8 KB Created: 2020-03-29 22:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: 3f0b959701bc88638401819ceffb7241 SHA-1: 2cee0695675ef2b521dc92a8adaf5e245bbe7f95 SHA-256: 8969a28d1cc93519768b215f53e054f3371c321350e5a5b9ebbdbc1edaccddb1
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, a common tactic for SEO manipulation or distributing further malicious content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. While no scripts were directly extracted, the embedded URLs are the primary indicators of malicious intent, likely leading to phishing or malware download sites.

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://podollangpis.devsite-1.com/uploads/1/3/0/4/130483519/130483519.html#q+significa+ntc+en+facebook PDF link annotation
    • http://batonrougedogtraining.com/uploads/1/3/0/6/130640048/865cc.pdfIn PDF document text
    • http://cgpsl2.com/uploads/1/3/0/4/130491319/de859bc2f2d51.pdfIn PDF document text
    • http://thepawpuppy.online/uploads/1/3/0/7/130739280/5422671.pdfIn PDF document text
    • http://twelve21.ca/uploads/1/3/1/0/131070529/bd17fd0.pdfIn PDF document text
    • http://vegassellsvegas.com/uploads/1/3/0/5/130588452/guzegupizitot.pdfIn PDF document text
    • http://codilis.net/uploads/1/3/0/6/130621447/985947.pdfIn PDF document text
    • http://eracook-demo6.work/uploads/1/3/1/4/131413550/6222889.pdfIn PDF document text
    • http://baldisbasics.com/uploads/1/3/0/3/130313422/vazaruga.pdfIn PDF document text
    • http://comfortwithhygge.com/uploads/1/3/0/2/130274305/8381920.pdfIn PDF document text
    • http://sa3emd.com/uploads/1/3/0/8/130814124/buvelelapefujinaduto.pdfIn PDF document text
    • http://commercialindoor.com/uploads/1/3/0/4/130489763/najelagojajasi-nuwexilupababiz.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://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063dd.bin
3b3e24cbf7f42926ecf83261189570bb3328ae0f70aa310cec055b9da6209d7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x63DD 8588 bytes
font_01_sfnt_off00008305.bin
b87ef8f9cbb02c40c3656bcc41c8058732279e44eadf2bd7417f0ba592fe9253
pdf-font-stream PDF embedded font (sfnt) at offset 0x8305 4256 bytes